No, he can't.

The screen has no touch functionality, I will adjust the faulty specification as soon as possible, thank you for pointing this out!

The PS5 only has the HDMI connection.

According to research, this model should only be available with AMD FreeSync. Here is a selection of Dell models that support G-Sync: https://www.dell.com/de-de/shop/monitore-und-monitorzubeh%C3%B6r/ar/4009/nvidia-g-sync?appliedRefinements=41836 and another list: https://www.dell.com/support/kbdoc/de-de/000131820/dell-amd-freesync-monitore-die-nvidia-g-sync-kompatibel-sind?lwp=rt.

According to our information, normally, it does not.