I don't know if this will help with everyone, but I had the issue where "we couldn't connect to realms right now" on the switch, but another user could get on just fine. I reset, restarted, even redownloaded. Nothing worked. Then I logged out of Microsoft (from within minecraft settings) and logged back in. That's when I found out my Microsoft account was locked. A quick trip through the unlock process and now everything works as expected.
Krys Muer
I don't know if this will help with everyone, but I had the issue where "we couldn't connect to realms right now" on the switch, but another user could get on just fine. I reset, restarted, even redownloaded. Nothing worked. Then I logged out of Microsoft (from within minecraft settings) and logged back in. That's when I found out my Microsoft account was locked. A quick trip through the unlock process and now everything works as expected.