As what I can read on their website, they are licensed by "Isle of Man Gambling Supervision Commission".

This is their website https://www.isleofmangsc.com/gambling/about-the-gsc/members-of-the-commision/... but I'm curious because I can't find their company name in the list ; https://www.isleofmangsc.com/gambling/online-gambling-licence-holders/