Maybe because of the new version of systemd, but that is just a guess (could be something else as well).
However, the keyboard LED worked fine till the update and still works when I switch the notebook on, but as soon it gets to the password screen to unlock the encrypted home partition, the keyboard light is gone!
I guess I have to wait for a Tuxedo update?
The last Manjaro update killed the Tuxedo Control Center as well !!
My fault, I didn’t check the Tuxedo Control Center, cause I coudn’t imagine that the 2023-04-06 update would change the profile which I have set there, but it did !!
So my keyboard light was set to zero und now I have it back.
Anyway thank you for making me aware, even so it took 2 week to look into the Tuxedo Control Center.
Shame on me.