I don't tend to write comments in these forums, but I'll admit openly that I use them from time to time to glean an answer to a pressing question.
Thank you AAH-1099! (and the previous entries as well, as they all converged on the proper solution)
Everywhere else I had read that I needed to demote my DC to convert from eval to a proper license, but apparently in 2022 server (Standard, in my case) I was able to run the DISM command successfully and then rebooted. After that, I applied the proper product key and activated and all was well. No need to demote/promote in my case, so I'm hoping it was something MS decided was an unnecessary restriction in previous versions and actually did the right thing!
In my case, I was pressed for time and needed to keep moving on building out the DC and migrating files, roles, etc and just figured I would "get to it" on the proper license activation once the dust had settled and the VM was in production. I am very happy I didn't have to play games with transferring roles, demotion, etc just to activate it.