So it turns out, that when itch automatically puts a comment in limbo pending review, the owner of the community where it is posted is not informed of the comment and apparently cannot view it, much less approve or decline it.
If itch staff only approves/declines such posts in the public community or when flagged as spam, then I suspect quite a large number of users' indefinitely pending posts either have already or will soon (depending on when this came to be the case) accumulate in limbo, inaccessible to itch staff, community owners and the poster without URL, possibly using up valuable server space.