I’m afraid the problem will remain (if not made worse) because the camera lenses themselves stick out significantly beyond the plateau/bar itself on the Air and Pro, unfortunately. It’s a missed opportunity to make this part of the device flush. Just like, totally bizarre to me, Apple’s cases often added a lip around the bump area making sure even with a case on the device still cannot sit flush.
Perhaps a bit of a saving grace here is that the wobble is worst when tapping toward the top of the iPhone, but most of the typing is done toward the bottom of the device where iOS default puts the KB.