lot of people complaining, but, seems like they rolled it out already in UK and Australia... no real complaints I know of, and I'm in NZ and are on NZ/Aussie discords. Also teen mode doesn't actually seem that restrictive. Seems an ok move to me. But for whatever reason people seem to froth at the mouth when it comes to discord on here.
I have a discord account that I use very rarely, and just tried it (from the UK) and it didn't ask me for any ID or face scan. If they do start doing that, I'll simply stop using the service.