[jfedor2]

You could totally use HID Remapper to do what you want.

The PlayStation Access Controller has profiles that can be configured from a PS5 as you say, but regardless of the current profile or mapping, it always sends the raw button/joystick states in the report. They're not properly exposed in the report descriptor, but they're there. You would have to use what HID Remapper calls "custom usages" to get to this raw data. I can assist you with that if you're interested. Though it might be easier to find someone with a PS5 for the one time setup.