not sure what makes a "true semi auto"
It works in actual semi-auto mode, rather than being a revolver inside a dress-up shell. That's what makes it a semi-auto. Pull the trigger, it fires, cycles the action and is ready to fire as soon as the trigger is reset by releasing it. Does not need a long trigger pull to move the next pellet into the barrel or in to firing position. That's what a semi auto is.
If all you want is a pellet pistol that looks like a semi auto real handgun, there are a fair few around, but mostly they are toy grade crap. Some more expensive toy grade crap than others, but...
If you want one in .22 cal, pickings are slim. If you want, as stated, a semi-auto in.22 cal, the pickings are even slimmer.
If this is all a confusion caused by you not knowing what you were actually asking for, compared to what is available, then you need to do some homework and get an idea of what is what out there.
The Daisy is a revolver dressed up to look like a semi auto. Almost all the other 'semi auto' air pistols are too.
So, do you want a semi auto, or just one that looks like a semi auto?
Cheers
Trev