3/25 It's back!
I'm not sure if it works on every document, but it worked on one of mine!
(Edit on 4/26) It works on some documents but not on others... Does anyone else have the same problem?
2/23
Someone in the comment section said "The latest word, as of today, is "The latest update in the bug is that there are still some approvals that the team is waiting on. The Word team is treating this as a high-priority incident and is working to have this restored as soon as possible.". So anyone wondering for any updates, there it is...

Thank you!
(I will try my best to look for any updates given in this comment section)