This works for me, however, instead of looking for the device `TPPS/2 Elan Trackpoint`, I had to use the id of `TrackPoint Keyboard 2`. The downside of this fix is that pasting with the middle button does not work anymore.
A. Ehrmanntraut, L. Konle, and F. Jannidis. Proceedings of the 19th Conference on Natural Language Processing (KONVENS 2023), page 28--39. Ingolstadt, Germany, Association for Computational Lingustics, (September 2023)