Setting deamon user and group done on myservice.rc file:
service myservice /vendor/bin/myservice
class core
user system
group system
Resulting:
adb shell ps -A | grep myservice
system 346 1 10853048 10228 0 0 S myservice
Still:
adb shell ls -l /vendor/bin/myservice
-rwxr-xr-x 1 root shell 18088968 2025-06-12 06:18 /vendor/bin/myservice
Any advice is more than welcome