Earlier quoted context omitted.
I have been exclusively using a .so domain for about 10 years and never experienced any of these issues. What specific network blocks it?
You can see a bunch of users reporting this issue in the link the user above posted: https://www.reddit.com/r/Notion/comments/f6x9mk/why_the_so_d...
There isn't any indication the blocking is worse than most other TLDs.