Missing planes at PRG

Cant receive 2 b737 models at Prague airport although I Have bought them. It’s S7 from Novosibirsk and Ukraine International from Kiev. Been playing for a couple of days after I’ve bought them and still never seen them. Instead of this I have British a320 which I haven’t bought.

Arrivals are randomly generated from what you have already unlocked. It’ll take time but you will see them eventually.