Artem Dmitriiev
--- a/core/modules/link/src/Plugin/Field/FieldType/LinkItem.php
+++ b/core/modules/link/src/Plugin/Field/FieldType/LinkItem.php
      ],
    ];

+    return $form;
+  }
+
+  /**
+   * Form element validation handler; Invokes selection plugin's validation.
+   *
+   * @param array $form
+   *   The form where the settings form is being included in.
+   * @param \Drupal\Core\Form\FormStateInterface $form_state
+   *   The form state of the (entire) configuration form.
+   */
+  public static function fieldSettingsFormValidate(array $form, FormStateInterface $form_state) {
--- a/core/modules/link/src/Plugin/Field/FieldType/LinkItem.php
+++ b/core/modules/link/src/Plugin/Field/FieldType/LinkItem.php
+   *   The form state of the (entire) configuration form.
+   */
+  public static function fieldSettingsFormValidate(array $form, FormStateInterface $form_state) {
+    /** @var \Drupal\Core\Field\FieldDefinitionInterface $field */
+    $field = $form_state->getFormObject()->getEntity();
+    $field->getFieldStorageDefinition()->setSetting('target_type', 'node');
+    $handler = \Drupal::service('plugin.manager.entity_reference_selection')->getSelectionHandler($field);
+    $handler->validateConfigurationForm($form, $form_state);
+  }
+
+  /**
+   * Render API callback: Processes the field settings form.
+   *
+   * @see static::fieldSettingsForm()
+   */
+  public static function fieldSettingsAjaxProcess($form, FormStateInterface $form_state) {
--- a/core/modules/link/src/Plugin/Field/FieldType/LinkItem.php
+++ b/core/modules/link/src/Plugin/Field/FieldType/LinkItem.php
+  /**
+   * Render API callback: Processes the field settings form.
+   *
+   * @see static::fieldSettingsForm()
+   */
+  public static function fieldSettingsAjaxProcess($form, FormStateInterface $form_state) {
+    static::fieldSettingsAjaxProcessElement($form, $form);
+    return $form;
+  }
+
+  /**
+   * Adds the field settings to AJAX form elements.
+   *
+   * @see static::fieldSettingsAjaxProcess()
+   */
+  public static function fieldSettingsAjaxProcessElement(&$element, $main_form) {
--- a/core/modules/link/src/Plugin/Field/FieldType/LinkItem.php
+++ b/core/modules/link/src/Plugin/Field/FieldType/LinkItem.php
+    }
+
+    foreach (Element::children($element) as $key) {
+      static::fieldSettingsAjaxProcessElement($element[$key], $main_form);
+    }
+  }
+
+  /**
+   * Render API callback that moves entity reference elements up a level.
+   *
+   * The elements (i.e. 'handler_settings') are moved for easier processing by
+   * the validation and submission handlers.
+   *
+   * @see _entity_reference_field_settings_process()
+   */
+  public static function formProcessMergeParent($element) {
--- a/core/modules/link/src/Plugin/Field/FieldType/LinkItem.php
+++ b/core/modules/link/src/Plugin/Field/FieldType/LinkItem.php
+   *
+   * @see _entity_reference_field_settings_process()
+   */
+  public static function formProcessMergeParent($element) {
+    $parents = $element['#parents'];
+    array_pop($parents);
+    $element['#parents'] = $parents;
    return $element;
  }

+  /**
+   * Ajax callback for the handler settings form.
+   *
+   * @see static::fieldSettingsForm()
+   */
+  public static function settingsAjax($form, FormStateInterface $form_state) {
--- a/core/modules/link/src/Plugin/Field/FieldType/LinkItem.php
+++ b/core/modules/link/src/Plugin/Field/FieldType/LinkItem.php

+  /**
+   * Ajax callback for the handler settings form.
+   *
+   * @see static::fieldSettingsForm()
+   */
+  public static function settingsAjax($form, FormStateInterface $form_state) {
+    return NestedArray::getValue($form, $form_state->getTriggeringElement()['#ajax']['element']);
+  }
+
+  /**
+   * Submit handler for the non-JS case.
+   *
+   * @see static::fieldSettingsForm()
+   */
+  public static function settingsAjaxSubmit($form, FormStateInterface $form_state) {
--- a/core/modules/link/src/Plugin/Field/FieldWidget/LinkWidget.php
+++ b/core/modules/link/src/Plugin/Field/FieldWidget/LinkWidget.php
    return $element;
  }

+  /**
+   * Returns the options for the match operator.
+   *
+   * @return array
+   *   List of options.
+   */
+  protected function getMatchOperatorOptions() {
--- a/core/modules/link/tests/src/Functional/Update/LinkPostUpdateTest.php 0 → 100644
+++ b/core/modules/link/tests/src/Functional/Update/LinkPostUpdateTest.php 0 → 100644
+   */
+  protected $defaultTheme = 'stark';
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function setDatabaseDumpFiles() {
+    $this->databaseDumpFiles = [
+      __DIR__ . '/../../../../../system/tests/fixtures/update/drupal-9.4.0.filled.standard.php.gz',
+    ];
+  }
+
+  /**
+   * Tests update hook setting handler for field type.
+   */
+  public function testLinkFieldTypeUpdate() {
--- a/core/modules/link/tests/src/Functional/Update/LinkPostUpdateTest.php 0 → 100644
+++ b/core/modules/link/tests/src/Functional/Update/LinkPostUpdateTest.php 0 → 100644
+    $config = $this->config('field.field.node.test_content_type.field_test_5');
+    $this->assertEmpty($config->get('settings.handler'));
+    $this->assertEmpty($config->get('settings.handler_settings'));
+
+    // Run updates.
+    $this->runUpdates();
+
+    $config = $this->config('field.field.node.test_content_type.field_test_5');
+    $this->assertSame('default', $config->get('settings.handler'));
+    $this->assertIsArray($config->get('settings.handler_settings'));
+  }
+
+  /**
+   * Tests update hook setting handler for field type.
+   */
+  public function testLinkWidgetMatchSettingsUpdate() {