It's odd, I've helped family and friends setup several M2 Airs and all of them had a nice satisfying, low tone, non-clickity, nice and thunky trackpad clicks on 'Light' click mode. There were variances, but none sounded cheap and were all superior to the clicks on my MacBook Pros.
As for the keyboard, there are variances there as well from one unit to the next in terms of key backlight temperature, bleed and overall keyboard feel. While all were good, I noticed that the keyboards that had cleanly lit backlit keys (little to no bleed when looking at it on angles) had a springier, quieter and more satisfying typing experience. Possibly two different keyboard suppliers.
I also noticed display variances. Again, while all good and very similar, some had more backlight bleed than others, some had a bit more contrast and better black levels than others as well. There were also tiny differences in brightness with the two I had side by side.
There are also variances to the M2 Air's bottom cover as I've mentioned in other posts. The bottom plate/cover should be seated perfectly even with the bottom chassis, but I've felt the seams on a few units and noticed that there were quite a few seams that were noticeable to the touch due to the cover sitting a bit too high or a bit too low. You shouldn't feel any seams with a properly fitted bottom cover.
As I've said many times, these variances are due different suppliers making the same components for Apple to a certain spec, in addition to variances from part to part from the same supplier. It sucks and I hate when I get a non-desirable part in a new MacBook, but it's a gamble if you care about these things. For me if the display is good, I will forgive most other things.
This is why you have to laugh when you hear reviewers talk about keyboard and trackpads like Snazzy's review linked above. If he had 2 more units in for review, he'd probably see and feel these variances as well - now that would have been a helpful segment of the review. So, his summary should have mentioned that these were the findings and differences he found in his particular unit, the one you get may vary in terms of display, keyboard, trackpad and so on.