27 files declare their use of PluginFormInterface in Drupal 10

ActionFormBase.php in core/modules/action/src/Form/ActionFormBase.php

BlockPluginInterface.php in core/lib/Drupal/Core/Block/BlockPluginInterface.php

ChooseSectionController.php in core/modules/layout_builder/src/Controller/ChooseSectionController.php

CKEditor5PluginConfigurableInterface.php in core/modules/ckeditor5/src/Plugin/CKEditor5PluginConfigurableInterface.php

ConditionInterface.php in core/lib/Drupal/Core/Condition/ConditionInterface.php

ConfigurableActionBase.php in core/lib/Drupal/Core/Action/ConfigurableActionBase.php

ConfigurableImageEffectInterface.php in core/modules/image/src/ConfigurableImageEffectInterface.php

ConfigurableSearchPluginInterface.php in core/modules/search/src/Plugin/ConfigurableSearchPluginInterface.php

ConfigureSectionForm.php in core/modules/layout_builder/src/Form/ConfigureSectionForm.php

DefaultPluginManagerTest.php in core/tests/Drupal/Tests/Core/Plugin/DefaultPluginManagerTest.php

EditorPluginInterface.php in core/modules/editor/src/Plugin/EditorPluginInterface.php

FieldLayoutEntityDisplayFormTrait.php in core/modules/field_layout/src/Form/FieldLayoutEntityDisplayFormTrait.php

ImageToolkitInterface.php in core/lib/Drupal/Core/ImageToolkit/ImageToolkitInterface.php

LayoutBuilder.php in core/modules/layout_builder/src/Element/LayoutBuilder.php

LayoutDefault.php in core/lib/Drupal/Core/Layout/LayoutDefault.php

LayoutTestPlugin.php in core/modules/system/tests/modules/layout_test/src/Plugin/Layout/LayoutTestPlugin.php

MediaSourceInterface.php in core/modules/media/src/MediaSourceInterface.php

MenuLinkFormInterface.php in core/lib/Drupal/Core/Menu/Form/MenuLinkFormInterface.php

MultiWidthLayoutBase.php in core/modules/layout_builder/src/Plugin/Layout/MultiWidthLayoutBase.php

PluginFormFactoryTest.php in core/tests/Drupal/Tests/Core/Plugin/PluginFormFactoryTest.php

PluginWithFormsTraitTest.php in core/tests/Drupal/Tests/Core/Plugin/PluginWithFormsTraitTest.php

SearchPageFormBase.php in core/modules/search/src/Form/SearchPageFormBase.php

SelectionInterface.php in core/lib/Drupal/Core/Entity/EntityReferenceSelection/SelectionInterface.php

VariantInterface.php in core/lib/Drupal/Core/Display/VariantInterface.php

WorkflowTypeConfigureFormBase.php in core/modules/workflows/src/Plugin/WorkflowTypeConfigureFormBase.php

WorkflowTypeStateFormBase.php in core/modules/workflows/src/Plugin/WorkflowTypeStateFormBase.php

WorkflowTypeTransitionFormBase.php in core/modules/workflows/src/Plugin/WorkflowTypeTransitionFormBase.php