How can i filter my repeating group?

[workspace2707]

Guys, hi everyone, this is probably going to be a lot of text. I apologize in advance. In general for a long time I can not solve one problem and I really hope that you can help me.
When I create a “heading” I get a popup window, when I click on the “save” button the following action happens

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Anyway, my task is to make a form generator, the forms themselves I can create, the problem is filtering them. On the left side of the screenshot you can see the sections, my forms should be filtered by them, for example, the form “heading #1” should be in “section #1” and the form “heading #2” - in “section #2”

But as you can see, my group isn’t filtered that way. I would be incredibly grateful if you could help me solve this problem, thanks in advance!!!.
Here are a couple more screenshots from the database, might be useful

[foraanyas]

On the data source of the repeating group you are using to show the headers add a filter so this Heading’s section is equal to parent group’s section or whatever is storing the value of the section you want it to be.

[workspace2707]

Thank you very much, it works! <3