Ukraine. Diia (open-source govt services app) likely won't work. monobank either. on banks there is also Oshchad, Privat, Pumb, and none of them will work on Linux. GPay is a staple, I don't even have a plastic card (mono customer) because it's so good to just not fuck with keeping plastic around. plus there is a strong Quick Share culture, which I don't see working on Linux particularly well