Since the actual site ladders don’t deal with handicap games, one could just make their own “ladder” here, or in an OGS group.
Just list peoples usernames/ranks/positions and let them challenge each other to whatever setting you feel are reasonable and let them submit games, and adjust appropriately. Of course there’s a lot of manual work there if it’s popular enough, but it seems like the points counting was going to be manual anyway.
(iirc there was a point made about how one could potentially be sandbagging to stay at the top with incorrect handicap, but otherwise I thought it would be fun Handicap ranked ladder?)