This is how I find it in Monterey. If that has changed in the last two macOS versions, I do not know.How do I check which Version of the 30" ACD I have?
The next thing would be upgrading to M3 Mini when it is released....but as I read the thread...M3 does not work. That's bad so for the Lifetime of this 30" ACD it will most likely an M2pro Mini....hopefully this will work.
Go to About This Mac
Overview -> System Report
Hardware -> Graphics/Displays