Subdomains: Extra Payment required?

Hi Folks, I have bought AUDIO MAN Pro, but it expired on May 22, 2021. My main site: waterdomemusic.de (former musicartistsupport.de/) In the meantime I also have two additional subdomains: linky.waterdomemusic.de us.waterdomemusic.de Now I'm planning to renew my license. Do I also have to pay for my two subdomains? Thanx for your help and Greeting from Fulda, Germany Knut