Based on this comment:
Rseding91 wrote: ↑Thu Jun 13, 2024 6:10 pm This is done with frames having a special bit of logic that says "I am transparent, don't interact with me" if the style type is "none". It has nothing to do with the "ignored_by_interaction" part and can also be used by mods. Simply make a frame with the base graphics set type of "none" (aka don't define it) and it will be transparent/not interactable but content in the frame is interactable.