They must have made the decision before the moulds were made and then just gave up. When I compare a mini 4 pro and mini 5 pro the 5 contains plastic that isn’t in in the 4. The ventral slots on the 4 are missing on the 5. Internal ribs that are...
You'll be fine.
All my flying is done over the ocean and I've flown thousands of miles.
What you're planning has no more risk than flying in an open playing field.