I got it working. I don't know what changed and it doesn't make sense to me so this might be next to useless but I'll briefly list some ideas/things I tried.It's possible Meta or Unity fixed something on their end so I encourage everyone to just try ...

I appreciate the prompt reply. I don't think it can be because I'm still able to import the now deprecated Oculus Integration package 57.0.1

I'm having the exact same issue. Importing by name didn't work. I tried importing only the core that also doesn't work. Let me know if a solution is found.