I've just started using the PMDG 737-800 although it was released in late August 2022.
I notice that ProATC-SR has the ability to select separate cockpit compatibility settings for the PMDG 737-600 and 737-700, which were released before the 737-800, together with the Fenix A320. It does not give an option to select the 737-800.
I have selected the 737-700 - after all, the cockpit is presumably identical or almost - so but do you have plans to add an option for the 737-800 to make this clear to everyone?
You are probably also aware that PMDG are about to release the 737-900.