While I guess there is some benefit to using a .22 for range shooting and developing "memory muscle" and basics and such.
BUT, you need to practice with the gun you will be carrying .. more so.
You have to be able to have the "muscle memory" of what that thing is going to do with the recoil. The .22 will not do that.
If you are practicing draw, double tap.. the .22 will not do that. Wrong gun, wrong holster.
Another neat "toy" are those no bullet practice setups. Like this:
https://www.laser-ammo.com/laser-trainingYou don't get the recoil practice, but you are practicing with a weapon that is the same size and weight as your carry (it IS your carry weapon). So, for draw and initial round placement, it will probably be a good training tool.
Oh.. I suppose I should say what I use.
Springfield XPS 9mm with extended clip. And I carry it all the time.