IOS app not available in Russia no more?

That's a strange decision. Let's hope the 1Password team issues an official statement. People remove their apps when they cross the border because they have to show their phones. Removing access to the app is dangerous and non-ethical. 1Password claimed to be privacy focused, but it takes privacy away from those who need it most.

Yes, they should. And not only from Russia. If a company takes away access to your data, this is a reason to think about whether it can be trusted to store them.