New domain, but still .wordpress when I try to log in??

I’m trying to move from https://stellamoniq.wordpress.com/ to https://www.stellamoniq.no. However, after I finished the process I still end up in the same https://stellamoniq.wordpress.com/wp-admin/ dashboard even though I specifically enter https://stellamoniq.no/wp-admin ??

How do I get admin access to the site on https://stellamoniq.no/wp-admin?