Is there an app I can run to enable the GPU? Also what would be some other uses for my NAS? Is Jellyfin better than Plex?
Did you install the NVidia drivers? I found an old post here that might still be applicable: Enabling Nvidia GPU in existing Docker app - #2 by ABain
Is Jellyfin better than Plex?
Such general judgements are usually in the eye of the beholder and different folks will come to different conclusions, based on their needs and preferences.