You’ve got the right terminology. It all really depends on how many additional rounds you want the extension to add to your stock 12-rounders.
There’s the +2 extension that CZ makes and some of the ‘tactical’ models come with from the factory.
CZ Custom offers a few options
Hyve Technologies offers a +3
Shield Arms makes a +5
Springer Precision offers some that are competition oriented and sized to meet USPSA rules
Do a google search, if one catches your eye ask here about it, good chance somebody has one and can tell you about it.
I have the Shield Arms +5 and Springer Precision +4 for my P10C. If I was to switch to a P10S for EDC, I’d probably carry it with the stock 12 rounder, but have a spare mag with some sort of extension on it for 14-17 rnds.
I haven’t picked up a P10S yet, but on my P10C I have