I have a similar issue, reported in MCPE-176408: MCPE-176408. It is repeatable every time on iPad 5th gen. with iPadOS 16.7.2 by following the steps I have put in that issue report.
This is on an iPad (5th generation) running iPadOS 16.7.2 (latest update).
I am experiencing this as well. I previously reported a similar issue in MCPE-176408 : game crashes after creating world. That issue is still 100% repeatable for me. However, yesterday I also saw the issue reported here, with the game crashing at 40% even though I didn't create a world.