Fix: add some layouts

css/layouts.css

+.layouts-dashboards-1 {
+  display: flex;
+  justify-content: space-between;
+}
+
+.layouts-dashboards-1 .row {
+  display: flex;
+  flex-direction: column;
+}
+
+.layouts-dashboards-1 .row:first-child {
+  flex: 1 3
+}
+
+.layouts-dashboards-1 .row:last-child {
+  flex: 2 3;
+}
+
+.layouts-dashboards-2 .row > div,
+.layouts-dashboards-1 .row > div {
+  flex: 1;
+  padding: 1em;
+  box-shadow: 0 2px 4px 0 rgba(0, 0, 0, 0.2), 0 4px 10px 0 rgba(0, 0, 0, 0.19);
+  margin-right: 1em;
+  margin-bottom: 1em;
+}
+
+.layouts-dashboards-2 {
+  display: flex;
+}
+
+.layouts-dashboards-2 .row {
+  flex: 1;
+  display: flex;
+  flex-direction: column;
+}
+
+.layouts-dashboards-2 .row > div {
+  flex-grow: 1;
+}
+
+@media only screen and (max-width: 600px) {
+  .layouts-dashboards-1,
+  .layouts-dashboards-2 {
+    flex-direction: column;
+  }
+}

dashboards.layouts.yml

 layout_1:
-  label: 'BC three column'
+  label: '2 and one column'
   path: templates/layouts
   template: layouts--1
   category: 'Dashboards'
@@ -14,3 +14,19 @@ layout_1:
       label: Left Bottom
     three:
       label: Right
+
+layout_2:
+  label: '3 columns'
+  path: templates/layouts
+  template: layouts--2
+  category: 'Dashboards'
+  icon_map:
+    - [one, two, three]
+  library: dashboards/layouts
+  regions:
+    one:
+      label: Left
+    two:
+      label: Middle
+    three:
+      label: Right

src/Entity/DashboardViewBuilder.php

@@ -95,9 +95,7 @@ class DashboardViewBuilder extends EntityViewBuilder {
     $cacheability = new CacheableMetadata();
     $storage = $this->sectionStorageManager->findByContext($contexts, $cacheability);
     if (is_a($storage, UserDashboardSectionStorage::class)) {
-      if ($entity->isOverriden()) {
-        $entity->loadOverrides();
-      }
+      $entity->loadOverrides();
       $contexts[Dashboard::CONTEXT_TYPE] = $contexts['layout_builder.entity'] = EntityContext::fromEntity($entity);
     }
     $this->moduleHandler->alter('layout_builder_view_context', $contexts, $storage);

templates/layouts/layouts--1.html.twig

-<section {{ attributes }}>
+<section {{ attributes.addClass('layouts-dashboards-1') }}>
   <div class="row">
+    {% if content.one %}
     <div {{ region_attributes.one }}>
       {{ content.one }}
     </div>
+    {% endif %}
+    {% if content.two %}
     <div {{ region_attributes.two }}>
       {{ content.two }}
     </div>
+    {% endif %}
+  </div>
+  {% if content.three %}
+  <div class="row">
     <div {{ region_attributes.three }}>
       {{ content.three }}
     </div>
   </div>
+  {% endif %}
 </section>

templates/layouts/layouts--2.html.twig

+<section {{ attributes.addClass('layouts-dashboards-2') }}>
+{% if content.one %}
+  <div class="row">
+    <div {{ region_attributes.one }}>
+      {{ content.one }}
+    </div>
+  </div>
+  {% endif %}
+  {% if content.two %}
+  <div class="row">
+    <div {{ region_attributes.two }}>
+      {{ content.two }}
+    </div>
+  </div>
+  {% endif %}
+  {% if content.three %}
+  <div class="row">
+    <div {{ region_attributes.three }}>
+      {{ content.three }}
+    </div>
+  </div>
+  {% endif %}
+</section>