Did you recently switch the display setting from Dolby Vision/HDR to SDR? I did this in the past and it caused this same issue. Had to switch back the setting to get the other screen savers to show up again.
Did you recently switch the display setting from Dolby Vision/HDR to SDR? I did this in the past and it caused this same issue. Had to switch back the setting to get the other screen savers to show up again.