Players can still explore the vast open world of Forspoken after the credits roll, using their spells and abilities to finish any side content they may have missed before beating the game. Although a New Game Plus mode does exist as of this time of writing, players can continue their adventure after beating the final boss. With a plethora of in-game events such as Nightmares, the land of Athia still provides opportunities for players to fight various enemies and experience new magic builds through the expansive skill trees for Frey.
https://screenrant.com/best-things-after-beating-game-forspoken/