Hey, I managed to get access via the ONVIF integration which has the benefit of having all entities the camera provides in HA as well.
I am not able to call the snapshot url successfully besides having contacted the support (which was unfortunately useless as they just repeated that it is working in their test environment). I manage to find a workaround with a blueprint discussed here: https://community.home-assistant.io/t/send-camera-snapshot-notification-on-motion/254565