My opinion, with which reasonable people might differ:
At 25 yards, you probably don't need or want magnification. So a simple red-dot makes sense.
For a .22 used for recreation shooting or small game hunting, size/concealment isn't a big issue. You also don't have to worry about "hard use" durability, as you would on a dot to be mounted on a reciprocating slide. So a wide variety of red-dot sights are viable.
I would tend to go towards a more open (non-tube) design with larger glass. If you're trying to shoot small game that isn't necessarily holding perfectly still for long periods, rapid acquisition of the dot will be important, and bigger, more open windows make that easier.
I'd go with a C-More Railway. You'll get a large window, good durability, reasonable battery life, and reasonable pricing. It has an interchangeable diode, so if you start with, say, a 6 moa dot and decide you want to go smaller (perhaps if you're mostly hunting/shooting in heavy shade or at dusk), you can buy a replacement diode at pretty cheap prices and try a 3 MOA, or whatever size you want. Downsides would be that it's larger than some of the more recently-developed optics that are intended to be mounted directly on reciprocating slides for tactical/carry use, and will be a touch taller in terms of height-over-bore than those types. And it will be more expensive than some of the cheaper red-dots that are probably adequate for that purpose... .22lr just doesn't put that much of a load on the optic.
I'll admit to some bias because that's what I personally use on my USPSA Open-division race gun, but that's still the default option in that game.