My Android phone prevents me from recording phone calls at the request of my carrier, even though it's totally legal for me to do so in my jurisdiction.
I'm not loving where this is all going.
FWIW the default phone app on GrapheneOS supports recording phone calls.
Note that this doesn't mean that a state with multiple ethnicities/languages can't be a nation state. Indians, for example, generally have a clear national identity, despite being citizens of a huge federal republic with dozens if not hundreds of languages spoken, some of which don't even share a common language family. So, India is a nation state, unlike Belgium.