you can already do this via the character select screen - there are two cog wheels you can choose to upload character settings/macros etc to the server and the other is for your UI/Hotbars etc. simply upload and when you dload the game to the PS5 simply download the settings from the server. Alternatively if you have PS Plus you can also save the game's settings to the PS cloud and then redownload once the game is installed in the ps5.