Facebook flags Linux topics as 'cybersecurity threats' — posts and users being blocked
(www.tomshardware.com)
Your broad claim and what is actually being banned on instances makes it seem you want to include questionable if not destructive opinions.
Can you be more concrete? What are you missing, and where?
What banned content that couldn't find a home on another instance do you want to see?
Do you think opinions should be shareable in any form, or only in respectful form?