This has not been fixed with 14.2
I have this same problem. Running ios 14.2.1
i restored an iPhone 8plus to a iPhone 12 Mini 128gig and it doesnt have the issue.
i restored that same iPhone 12 Mini 128gig to a iPhone 12 Mini 256gig and the larger capacity mini has the issue (see everyone’s screenshots). And no, rebooting, soft resets, hard resets, re-restoring, turning on accessibility home button and resetting RAM, etc... none of that works. This is a straight up BUG.