Terran, thanks for letting us do a live accessibility review of the new KPAC! That is always a nerve-wracking experience, but you were very chill--and rightly so! It looks so good!
I filed a bug for the "show more copies" link and added a branch that includes the (old) KPAC files:
I can't remember whether I've shared this demo with the group, but this shows how the different input types, modes, and autocomplete attributes change the user experience for forms on mobile:
On desktop, very few of the types and modes have much effect except for the little "x" appearing in search types (as long as you're not in Firefox, as I was).