Use parent taxonomy as condition

It would be great, if one could test the visibility not only for one or more certain terms, baut also if the current term of the post is a child of another term.

Example: I have posts which have terms (taxonomy “My Taxonomy”) which are children of a parent term (e.g. “Main Category”) but only have the child term assigned.

Some test like this for “Relative Term Hierarchy” would be great but for single post display and not archive pages!

Is this possible? Selecting the parent term in the Location > Post Taxonomy doesn’t work.

Thanks and kind regards.