FYI, in case anyone is running 7.2.1, just be aware that you have to MANUALLY update because you need to agree to new terms that removes local hardware processing of some media types.
https://www.synology.com/en-global/releaseNote/DSM
7.2.2-72806 Update 1 is the update with the new patches.
If you're running Plex locally (i.e. - not in docker) you'll need to manually install the updated 7.2.2 patch. You need to download it locally, then push it back up to your NAS bypassing the normal process. You can't use the plex client to prompt the update, and you can't use the synology package manager to update.
The package links on Reddit and some other sites are older versions that may not install
https://www.plex.tv/media-server-downloads/?cat=nas&plat=synology-dsm72&signUp=0
September 27th, 2024 release is currently the latest non-beta version - v.1.41.1.9057-af5eaea7a
AMD/Intel
https://downloads.plex.tv/plex-media-server-new/1.41.1.9057-af5eaea7a/synology-dsm72/PlexMediaServer-1.41.1.9057-af5eaea7a-x86_64_DSM72.spk
This is why he moved to Texas