I'm against placing employee-to-employee conversations that aren't work related on work resources: No one can be honest because there's always a risk the company will use it against them.

Meta has/had a secret "ADHD support group" on Workplace, but I would be wondering who's reading it, what people are and aren't saying, and, again, how it could be used against them or taken out of context.

There are no "safe spaces" at work. It's fucking work, where politics and bullshit usually win over merit and personal ethics.