Lightroom Classic: Hierarchical Organization of Library Filters List

I have created a lot of library module filters. I'd like to be able to organize them so that, for example, all metadata-related filters are listed together in a section that can be twirled closed or open. This way, I don't have a long list of filters to navigate every time I need one of them. Also, I wouldn't have to make the first word "Meta" in each label's name to keep them together.

CURRENT
Here's what my list looks like now. Notice how all of my Flag-related filters start with the word "flag" so that they sort together.



PROPOSED
Here's a mock-up of what it could look like under my proposal. This would work similar to other panels in Lightroom where each group can be opened or closed by clicking on the black arrow. Also, the filters would be indented.



Thanks.