I've just finished season 1 of Vikings Valhalla and am about to start on season 2. Quote from IMDB: It's a follow-up series to 'Vikings' set 100 years later and focusing on the adventures of Leif Erikson, Freydis, Harald Hardrada, and the Norman King William the Conqueror. I've read bad reviews about it being boring, as well as it containing historical inaccuracies, but I'm enjoying it so far and it's worth a look IMHO. I got seasons 1 & 2 from TGx. It's already been mentioned on this forum.
https://www.imdb.com/title/tt11311302/