Can I add a 2021 aftermarket spoiler to my 2022

That's the problem you'll run into with many of the cheap aftermarket body kits. You can try using automotive body trim double sided tape. The factory lip piece mounted on the trunk of my BMW 135i is only held on by double sided tape. But it's not anywhere as big as that wing. The best way to mount that wing is to secure it with screws which means you'll have to drill through the hatch lid and wing. You can also contact a body shop to see what they suggest.

Personally, adding a wing like that is just fool hardy. You really have to like the look to put that on. Because it'll probably increase drag with no performance benefits which then leads to poorer gas mileage.