Thx, I checked your hint…
Even if I use the INDI Web Manager App on the PI4 and connect to the local drivers, the "Synscan Legacy" Driver is not listed - see attachment #1
If I use KStars 3.3.7 on the PI4, it is displayed - see attachment #2
I also checked some other mount drivers and I noticed some differences e.g. Celestron CGEM and AVX drivers not listed in WebManager, but in KStars!?
Why is there a mismatch between Web Manager and KStars app?
I ran the Raspbian script on my new Pi4 and it worked fine. I can connect to all my devices and control them properly.
Only issue I detected is that the "Skywatcher Synscan Legacy" driver for my mount is not visible via INDI Web Manager and can't be connected remotely.
Local on the PI4 it is visible and working.
Thx for the great work - clear skies