I have the same diff, but Acura wants that changed the first 20K km on the owner. I did it on the 2019 MDX, but when it came out just as clear as the stuff that went in I said not again. I think the 2 bottles I bought cost me $45 tax in. Can't remember really.
Consequently, the 2022 MDX diff remains unchanged. If Honda thinks it's critical they should cover it. Next owner can do it. No new owner wants to pay 200 bucks for that at the dealer so soon after purchase/lease.
How often to you change it?