Ross Marquand played Red Skull in Avengers: Infinity War and Endgame, taking over the role from Hugo Weaving. Though his screen time in those films was pretty limited, Red Skull definitely experienced some pretty big development, storywise. In relinquishing the Soul Stone, it seems, the curse that bound him to Vormir was broken and he no longer has to serve as a Stonekeeper. Basically, he’s free to go.
Article source: https://www.cinemablend.com/news/2495944/one-avengers-endgame-star-has-an-idea-for-a-reunion-between-captain-america-and-red-skull