Roaming in Mexico

Does anyone else have issues while roaming in Mexico?

I tried Mexico City and Cabo so far, in both the coverage was very spotty. Especially in a car service comes and goes, internet sometimes works then doesn’t work. In Cabo I could understand more, but not in Mexico City…

I have the North America Connect add-on with 10GB of roaming. Boost Dish-native eSIM, on iPhone 16 Pro.