What community do you recommend to post "complicated questions"?

For example, I just posted that:

https://stackoverflow.com/questions/63399940/how-to-tell-ssh-to-setuid-after-pam-and-not-before-to-remap-users

and I am being told this is not "SO material".

All my latest SO questions have been in the same "vein", more architecture and design questions than strictly code question.

I'd like a friendly community that can share experience and have healthy debates over tricky questions.