Careful here guys. Don't want to lead folks astray, especially those who may be new and looking for something specific. It's confusing enough with GM putting holds on various packages and/or components. Some of what can and can't be had is because of availability, not because it can't be ordered a particular way. The air ride wasn't part of the Denali package in 2021 either so that isn't new. Don't know about before that, so maybe it has something to do with the IRS setup.
Since 2021 at least, the air ride could be ordered separately, or as part of upgrade packages (ultimate/premium, or whatever, just check the website for current contents). 20 inch vs 22 inch wheels is also part of package upgrades. Otherwise it's also your choice when ordered separately, independent of air ride and/or tow package. I avoided the upgrade packages, other than Technology Package, on my 21 Denali because they included things I didn't want. The rest of the order was ala carte. So, I got 20 inch wheels, Magneride, no air ride and Tow without Max Trailering. Could have had air ride with the 20's, or no air ride and 22's. Not many cross-system options are mutually exclusive.