As far as I can tell the reason they bought a bunch of stuff with crypto is because crypto fans gave them a bunch of crypto, not because they need to route around actual problems with the banking system.
Of course Ukraine would make noises about how much they like crypto, because anything that encourages crypto holders to donate is good for them. Even if they prefer fiat they probably won't complain- making crypto donors feel good about giving them money (because it is acting as an advertisement for crypto generally) is a good idea for Ukraine.