The list was originally compiled by Oso. I made some corrections to it and added more information to it.
Yes, DJI support will normally only rattle off whatever is displayed in the DJI store or other documentation on the DJI website.
I only own the GL658C, so that’s the only Inspire remote controller I was able to try linking to my P4. Do you have a P4… and not a P4A, P4P, or P4PV2?