There are only a very few that really work well...
Keltec's PMR-30 & RMR-30...had a few issues early that are now fixed...
Grendel's P-30, P-31, & R-31
Marlin's 922M
H&R's 700
Excel's Accelerator Pistol...blockyer than an 80's Volvo..not fun to fire, even in such a small caliber...
Volquartzen's remake of the failed 1022M...you really DO have to throw $700 in a 1022M to make it work right
Reportedly CZ has a nice semiauto as well, the 455, I think? Haven't tested one yet...
Same for the ARMSCOR pistol that just came out...
The rest of the .22WMR's including AMT's Automag II, in my view, sucked.
I've not tried one of High Standard's version of the Automag II yet...so they may have improved on the original...
Heck, there was even a thread on this last month or two...same stuff applies...lol