The snd-hdspe driver was mentioned in a previous topic April 2023
RME card not detected, but working normally in Windows
But the main developer passed away in 2022 and the project has not been maintained since
In memoriam Prof. Dr. Philippe Bekaert (1967-2022) · Issue #13 · PhilippeBekaert/snd-hdspe · GitHub
Linux users on RME User Forum and Ardour forum have have more experience of using RME devices