Plex import frequency

Sonarr version (exact version): 3.0.10.1567
Mono version (if Sonarr is not running on Windows): 6.12.0.200
OS: Ubuntu

Not sure if this is the appropriate channel to ask. I am new to the *arrs. Sonarr is up and running well for me. I want to make the front end using Plex more seamless. When I add shows to my watch list, I can only seem to get Sonarr to import them when I log in and update the import list manually. Is there a way to automate this to happen on add to the watchlist or at least with high frequency? Is the manual input by design? I can’t seem to find an import list frequency option on the GUI. When I search this question, I get answers from 5 or 6 years ago so I figured I would ask from the source.

It automatically runs on a schedule, which for Plex is every 6 hours.