Yeah, that's annoying. Public transport companies sometimes have this issue, where they don't offer travel planning on their normal website, but tell everyone to use their app, only you can't install it because you're not from that country nor in that country when you're preparing to travel there from the comforts of your home.
That's been available on their site for as long as I can remember. Long before they had an app that would tell you as well. Heck, I'm pretty sure before Twitter even existed.
You can change your account's country by opening the store and tapping on your avatar. It's a bit convoluted (requires you to make up an address) but it's not the end of the world.
