add_to_calendar.info.yml

 name: "Add to calendar"
 description: "Provides a computed field for displaying add to calendar links."
 type: module
-core_version_requirement: ^9 || ^10
+core_version_requirement: ^10.1 || ^11
 dependencies:
   - drupal:datetime_range

src/Plugin/Field/FieldFormatter/AddToCalendarFormatter.php

@@ -149,7 +149,7 @@ class AddToCalendarFormatter extends FormatterBase implements ContainerFactoryPl
           ];
         }
         catch (\Exception $e) {
-          watchdog_exception('add_to_calendar', $e);
+          \Drupal\Component\Utility\DeprecationHelper::backwardsCompatibleCall(\Drupal::VERSION, '10.1.0', fn() => \Drupal\Core\Utility\Error::logException(\Drupal::logger('add_to_calendar'), $e), fn() => watchdog_exception('add_to_calendar', $e));
         }
       }
     }