This doesn’t seem to work on the P1S.
I created a custom filament profile in orca slicer, which showed up In the [prepare pane in both Studio an Orca Slicer. I think I printed using the the profile from Orca, and got the unknown filament in AMS confirm dialog.
The next day, Orca had lost contact with the printer.
I used this post an re-established the printer connection to both slicers, but I still can’t select the custom profile for an AMS slot on the device page.
I now notice that it also doesn’t show up as an option for the external spool either.