Samwell Blackwood did not get recast in Season 2 because he has not appeared on the show yet. The Blackwood boy seen in Season 1 Episode 4 is Willem (played by Alfie Todd), an original character ...

One of those suitors is a boy much younger than Rhaenyra named Samwell Blackwood. Rhaenyra doesn’t want to marry the boy, obviously, and dismisses him.