"Ghost of Tsushima: Director's Cut" will be released on PC on May 16, and pre-loading is currently available. The official also revealed the support for handheld devices such as SteamDeck in the announcement.
"We know that many people are eager to play Ghost of Tsushima: Director's Cut on handheld gaming devices like Steam Deck. We're excited to share that the single-player game (including DLC) can be played on Steam Deck and similar handhelds. We've done a lot of work to optimize performance and provide the best experience on these devices. ”
"You may notice that Steam marks the game as unsupported for Steam Deck, and this is because multiplayer co-op requires Windows to access the PSN integration."