Question [Solved] The comment form disappeared after the introduction of child pages

Hi! I have many types of content on my site, and the comment form was present for every type that i check.

But now I can't select one specific type of content in the form, it's missing in the form.

Previously we have changed the pages so that they have child pages. Now there is no form on either the child or parent pages, and it is impossible to select the type of content in the form settings.

The standard form of comments from the topic is now displayed in the content.

Is there any way to solve this problem?

(Sorry, the site is only in Russian.)