Paigntonian - // Is anyone seriously suggesting that Harry and Meghan couldn't have their passports for foreign travel? They traveled several times on non-official hols. //
I don't think anyone would seriously be suggesting that they couple did not travel with passports.
Far more likely is that the royal couple would be fast-tracked through a private passport check, and their passports would be handed in by, and returned to staff, rather than the couple themselves doing it.
On that basis, Meghan's statement that she 'handed in' her passport seems perfectly reasonable.
Similarly, it is unlikely that she is going to drive a car personally in the UK, so again it's reasonable that her keys and license were handed over for safe-keeping, I would imagine that is protocol for all the senior members of the Family