I’m out of my element, I have no idea how to know if this is a perfectly usable flange and I have no idea how to take it off if it isn’t. I tried clearing out the wax but it just seems layered on top of layer of it.…
From Reddit - r/plumbing: Just saw this (directly underneath where 2nd floor toilet is) a week after 1st floor bathroom got old plumbing replaced. Am I screwed?