How many miles out of the stock S22 rear tire

So I'm getting less than 3000, sometimes just only over 2000 miles on my tires but I ride only in the canyons and mountains and I don't do any commuting. When I'm getting on it, I drop my PSI basically until the sidewall doesn't collapse so I imagine I'm on the lower side of the mileage range. 

Otherwise, is say The mileage you're describing is normal for the stock tire and the current profile suggests a good amount of commuter or touring type mileage that wore down the center. The stock tire is a sport tire that has excellent grip for the Twisties and even beginner and intermediate track days. It has good grip but it wears down faster.  Whereas the profile of the tire in its current shape would suggest a sport touring tire would be more appropriate for your bike. We have a bunch of threads on here so if you use the search, you'll find good suggestions for a sport touring tire. 

I would say your tire is done. You will almost definitely be down to the wear bars with another ~700 miles and tires loose a significant amount of grip before they even get to the wear bars. Could you squeeze out another ~700 before you start seeing chords? Probably. But just be aware that youre ALREADY lacking grip in the rear. You might want to pump up the pressures in the back to slow down the wear a bit but this will also decrease grip. So depending on what type of miles and what weather you're going through, you might be fine. But if it were me and the type of riding I do? Absolutely would be replacing.

I got about 3000 miles on the S22, replacement tires have been Michelin Road 5 or 6 (excellent sport/tour tire). I get around 7000 to 8000 on the Michelins. Your tire has seen better days and should be replaced.

Almost to the wear bars on the rear after about 150 miles of track riding. Was pretty ham fisted on corner exit that day, plus the track surface was fresh and abrasive.
On my FZ09 I can get a LOT more out of a s22 rear 6+ days if I keep corner speed up and be smooth on the exits. 700+ miles I'd guess.

This type of tire isn't well suited to commuting since they're pretty soft. 2k-3k miles on a rear might be typical. Go with a sport touring tire for mileage.

I went to Pirelli Angel GT 2 after my stock tires wore out. LOVED them. Then went for another set this past winter only to find that they're discontinued in the US for some reason. After chatting with the RevZilla team I ordered a set of Metzeler Roadtec 01 SE's and so far they've been great. Almost 4k on them now and they still look and feel great.

My tire experience so far has been (in miles):
4,126 - Stock rear tire replaced with Michelin Road 6
7,247 - Stock front tire replaced with Michelin Road 6
10,856 - Rear tire replaced with Michelin Road 6. Still had some life left most likely.
~16,850 - Rear tire replaced with Michelin Road 6. The previous one had a puncture and I wasn't comfortable riding on a plug I did myself. I still had 2k miles left most likely.

The front tire (Michelin Road 6) is still going strong and probably has another 3-4k miles left on it, so in total I'm expecting 13k miles out of the front.

Bike details: 
Year 2022, everything is completely stock.