I’ve searched the forum and there are COUNTLESS requests for this basic feature but it seems like it goes on deaf ears, folks offer “workarounds” and nearly no replies from devs. Is there a definitive answer to this? I’m running Plex on Windows 10 and am a Plex Pass lifetime member. Thanks.
No, this is not possible.
If you don’t want your sharees to see a certain library, don’t share it with them.
With a plex pass you also have a more fine grained method of access control:
https://support.plex.tv/hc/en-us/articles/204232573-Restricting-the-Shares