Originally Posted by
KARFA
you would need to split the booking to do that unfortunately- and that may have implications for seat selection and baggage allowance if you end up with one of the bookings not having someone with status.
generally everyone on a booking must be on the same flights and in the same cabin, so if you upgrade you all have to do it.
This what I thought as well but wasn’t sure of it. Thanks KARFA for confirming this.