Does anyone know if it's possible for BD to have LX seats released to them?

I have a friend travelling LX ZRH-ORD in F this week and my ZRH-LAX is showing 4 F seats available on Expertflyer, so I would like to swap my friend to my flight.

Have mum and aunt travelling LX ZRH-LAX in C the day before with 2 F seats available, which they would like to upgrade to.

I've called pre-travel support but they can't see any of these seats.

Any ideas?