Your user will almost always benefit from the data being stored in the same country as them. Using an app across an ocean tends to suck. And the user gets to benefit from their country's consumer protection laws.
Which is to say, the only parties that benefit from being able to store your data in other countries is often global monopolies shifting your data to where they have the least legal oversight.
If you can legislate data location then it's better to just legislate access and privacy rights to that data instead of the location.
Forcing data to be stored within borders just makes it harder, more expensive, and more inefficient to serve more customers for no real security benefit. And a company with illegitimate operations isn't going to be following these guidelines anyway.
Which is to say, the only parties that benefit from being able to store your data in other countries is often global monopolies shifting your data to where they have the least legal oversight.