Newly added TV shows not showing in PMS

[JuiceWSA]

You may want to try compliant file names and structures for TV Shows:
https://support.plex.tv/articles/naming-and-organizing-your-tv-show-files/

Then you may want to demote LMA for Shows and Movies (all tabs) so Plex will stop preferring embedded and bogus Title Fields in your MP4 files - over any file names and missing structure elements you may have - or not have:

Video File Naming

With LMA in priority, Embedded Titles within MP4/M4V files are preferred - even over a perfect file name. Local Media Assets should - AT ALL TIMES - remain enabled (unless specifically instructed to turn it off). Local Media Assets should be ‘Demoted’, to the bottom of the stack of active agents under ALL tabs in Shows and Movies, but should NOT be disabled. Local Media Assets is needed for many things - it doesn’t need to be given Tip-Top-Priority (as Plex has so hatefully placed it as it’s …

There’s nothing preventing the matching of this one that I can see - in this test:

A TV Show Library Folder\ <---TV Show Library 'Add Folders' aimed here - ONLY
....The Salisbury Poisonings\
........Season 01\
.............The Salisbury Poisonings - S01E01.mp4
.............The Salisbury Poisonings - S01E02.mp4
.............The Salisbury Poisonings - S01E03.mp4

'Cause that results instantly and naturally as: