Suppressed .22? How??
They sell sub-sonic .22LR ammo tho I don’t think I have ever seen any. Of course you would still need a silencer.
I got a FIREPOWER magazine from the 1980s in which a 2 liter soda bottle was placed over the barrel of a .22. It worked so well a manufacturer came up with a cheap connector.
Then the BATF demanded it be taxed out of existence.
Also, must use subsonic ammo.