11 files declare their use of ContentEntityDeleteForm in Drupal 9

BlockContentDeleteForm.php in core/modules/block_content/src/Form/BlockContentDeleteForm.php

ContentTranslationDeleteForm.php in core/modules/content_translation/src/Form/ContentTranslationDeleteForm.php

DeleteForm.php in core/modules/comment/src/Form/DeleteForm.php

EntityTestDeleteForm.php in core/modules/system/tests/modules/entity_test/src/EntityTestDeleteForm.php

FeedDeleteForm.php in core/modules/aggregator/src/Form/FeedDeleteForm.php

MenuLinkContentDeleteForm.php in core/modules/menu_link_content/src/Form/MenuLinkContentDeleteForm.php

NodeDeleteForm.php in core/modules/node/src/Form/NodeDeleteForm.php

path.module in core/modules/path/path.module

Enables users to rename URLs.

ShortcutDeleteForm.php in core/modules/shortcut/src/Form/ShortcutDeleteForm.php

TermDeleteForm.php in core/modules/taxonomy/src/Form/TermDeleteForm.php

WorkspaceDeleteForm.php in core/modules/workspaces/src/Form/WorkspaceDeleteForm.php