13 files declare their use of DefaultFactory in Drupal 9

ArchiverManager.php in core/lib/Drupal/Core/Archiver/ArchiverManager.php

ContainerFactory.php in core/lib/Drupal/Core/Plugin/Factory/ContainerFactory.php

DefaultFactoryTest.php in core/tests/Drupal/Tests/Component/Plugin/DefaultFactoryTest.php

DefaultsTestPluginManager.php in core/modules/system/tests/modules/plugin_test/src/Plugin/DefaultsTestPluginManager.php

EntityDisplayFormBase.php in core/modules/field_ui/src/Form/EntityDisplayFormBase.php

FieldBlock.php in core/modules/layout_builder/src/Plugin/Block/FieldBlock.php

FieldTypePluginManager.php in core/lib/Drupal/Core/Field/FieldTypePluginManager.php

FormatterPluginManager.php in core/lib/Drupal/Core/Field/FormatterPluginManager.php

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

MigratePluginManager.php in core/modules/migrate/src/Plugin/MigratePluginManager.php

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

TestPluginManager.php in core/modules/system/tests/modules/plugin_test/src/Plugin/TestPluginManager.php

WidgetPluginManager.php in core/lib/Drupal/Core/Field/WidgetPluginManager.php