Delete attached images?

Seems like deleting attached images is an old question.
https://ww.wp.xz.cn/support/topic/question-about-complete-deletion/
–> it might be dangerous for reasons
https://ww.wp.xz.cn/support/topic/delete-post-attachments-too/
–> it’s worthwhile and there’s thing in progres
https://github.com/sudar/bulk-delete/issues/205
–> there’s a PR
https://github.com/sudar/bulk-delete/pull/541

Seems that was merged. Now why can’t I see a check box for deleting attachments?