@MojangSupport upon sign in on PS5 I get an error saying that my Microsoft account is linked to another PSN account. This is not the case I've played signed in on this PSN account many times with the same Microsoft account.

Account linking is permanent, once linked you can only use the PSN account linked to your Microsoft account. Make sure that you are using the correct account login information. Check out our FAQ for more info: bit.ly/3yIzgLG ^AM

I am using my only PSN and only Microsoft accounts. I have previously signed in using this combination without issue. Microsoft support was no help and directed me to you guys.