I can't say how much bitcoin ATM has helped countries that use it, in the sense that, my country doesn't have a bitcoin ATM and bitcoin ATM is not actually rampant in most countries. And that means that, so many countries are not in deep use of it due to how bitcoin seemed to be illegal or legal in their country. And the only way they prefer acquiring Bitcoin is through a crypto exchange, not a Bitcoin ATM.
Nevertheless, there are about nine countries(USA, Australia, Canada, Europe, Poland, Switzerland, El Salvador, Austria, and Spain) that have bitcoin ATMs in their city. They should tell us how bitcoin ATM has been of help to them because they are in a better position to do that. As for my own opinion, I don't see any help that bitcoin ATMs can render to countries since there are easy ways to acquire them.