I have Bitcoin Core 0.21.0 right now and it's complaining about "Warning: unknown rules activated (versionbit 2)". Probably something to do with taproot. So before I upgrade Bitcoin Core, just wanted to make sure Armory is compatible.
Yes, it's fine... I'm currently running 0.21.1 and it works completely fine with Armory 0.96.5. I don't anticipate any issues or breaking changes with the upcoming 0.22 either, but it's impossible to say 100% until it has actually been released.