As of now, there is no way to link PS4 account to miHoYo, only the players on PC and other platforms can cross-save in Genshin Impact. To go through with performing a cross-save in this game, players need to log on PC, iOS, or Android using the same miHoYo account login information. Continue reading to know more about account linking in PS4.
As mentioned above, in the current version of the game there is no way to link your miHoYo account PS4 to PC for Genshin Impact. Now since it's not possible to link your PS4 account to PC or mobile for Genshin Impact, it means that cross-save is not going to be available for Sony gamers.
The reason for this feature not being available for the Sony gamers, miHoYo mentioned that this is because of the restrictions for PlayStation accounts. PS4 gamers can still enjoy cross-platform multiplayer with their friends on PC, iOS, and Android, but they will not be able to share saved data.
As far as game data is concerned, those of Travelers playing on PS4 will not be transferable to iOS/Android/PC. However, regarding gameplay, Travelers playing on PS4 will be able to invite Travelers playing on other platforms to join their world in coop mode (and vice versa)! https://t.co/OYPjtwxJk1— Paimon (@GenshinImpact) August 29, 2020