There is actually an INFP forum, but it has almost no activity and is pretty much defunct, save for maybe a couple of members:
https://infpforum.net/index.php
The forum itself badly needs tweaking and updates too, IMO, and is a bit sparse in terms of features. It's almost like a ghost town, really. From what it looks like one of the only members who is active on there is serenesam, who was banned from here for being quite racist, and from what I can tell only copy/pastes the
exact same random posts onto at least 4 different MBTI forums, almost like a bot, so...
Perhaps we ought to stage an invasion?