Good optic for 22

I have red dots, but it occurs to me that if most of the Bullseye community shoots the tube type optic, I should look at that.
Keep in mind I am 85, unlikely to be in serious competition, and will have serious problems with 50 yards, but am willing to
go that far if I can.

I’m 74, I use UD, Aimpoint 9000, Holosun 400 series and 530 series.
All work fine. Depends on a large dot, small dot, and cost that fits your budget.

I have several Holosun 407 series, prefer 2moa dot.  I was thinking of the ability to change distances when going from 25 to 50 yds, a consideration in 45 or 9mm,
I have no clue about 22 ballistics, but I suspect they are also in play at the different yardage.
I take it none of your recommendations are magnifiers? Somehow the tubes look
like scopes.

Normally, you don't need to make elevation adjustments between 50 and 25 yards with .22LR like you would with .45.

No magnifiers. Although I’ve heard of 1 power scopes being used in days of yore.

45 is often controlled by adjusting LL/SL loads

Another one is the SigSauer Romeo 5.

Most of the scopes in "days of yore" were usually slightly more than 1X often 1.5X. They did have dot reticles but were suspended by fine cross hairs. A few were just a dot. If someone made type type scope with a battery to turn the dot red or any color I would buy it! While using the typical pistol scope I noticed the reticle turning Green, I thought is was eye strain. Later it happened again but it was Blue. Soon I realized it was the color of the shirt I was wearing. I found that the dot and cross hairs were not black but were plain metal silver, probably stainless steel. With some help of a lens specialist we made a lens that gathered light, colored it and directed onto the cross hairs but didn't work in covered firing line. Then Aimpoint came out with their Red Dot and I gave-up. Some time later, I think Thompson came up with a battery version for their pistols. It was intended for hunting in low light. Unfortunately it was not bright enough for day time match shooting. Battery was odd voltage like 1.2V I thought if I put in a 1.3V battery I could increase the intensity though the directions said not to do it. Worked great for about 2 matches, they were right, I burned out the LED!

L. Boscoe, your red dots are the so called "reflex" type. Many folks do use them for Bullseye, but the "tube" type are generally preferred. There are lots of threads on this forum debating the pros and cons.

The key issue in your case will most likely be the mount. If you already have a Weaver or Picatinney rail on your pistol then it is easy to mount a tube type.

For a 22 you most likely will have very little or no elevation change from 25 to 50.

The extended tubes that are popular are simply sun shades. Generally nothing to do with magnification. Although most shade tubes are threaded and many folks do add aperture rings or polarisers to enhance the sight picture .