Seemingly no reason, haven't messed around with anything. I use FUTO Keyboard so I was using its built-in spellcheck, now in Settings the option is entirely not available.
Installed OpenBoard as I had used its spellcheck before and it was smooth, and now the list includes both FUTO and OpenBoard spellcheckers. But the thing is: neither work. No swiggly line under misspelled words when either is chosen.
Tried restarting, reinstalling, changing language settings everywhere - no bueno. I really have no idea why this suddenly stopped working. Please advise. Pixel 8