It is certainly a black art at this point in time.
For 5.4
Epic finally has admitted that there is a bug and it’s logged in their Issue Tracker
They say it’ll be fixed in 5.4.3. The best bet is to wait for that… but then again Epic has been known to miss those Target Fix builds and have the fix slip to the next build, or the next…
For 5.2
The good news is that you can ship with 5.2 today. However, to do so you need to fix 2 things.
and
Epic, doesn’t really give AR or iOS much attention. and AR on iOS is right in the middle of the Venn diagram of things they don’t seem to care about. But oddly they are building Vision Pro support… so I really don’t get what they are up to over there.