The Australian phone-repair vlogger Hugh Jeffreys' latest video features an iPhone 12 in need of a new display and rear panel. The YouTuber demonstrated that fixing these issues entailed quite a bit of effort, resorting to the use of fancy laser equipment at one point. Furthermore, this US variant has extra parts that makes its dissembly even trickier (and potentially more dangerous) than the average iPhone.
https://www.notebookcheck.net/A-device-repair-YouTuber-condemns-the-US-market-version-of-the-iPhone-12-as-almost-impossible-to-restore-independently.540673.0.html