Well, from the EUs perspective, while the US is certainly generally an Ally, it is sometimes a rather tense relationship.
I’d argue, you could describe China pretty similarly, although that would be somewhat disingenuous, as I think EU and US values are more similar than EU and Chinese values.
Anyway, if you don’t want the data of your people to go to some questionable other country, you’d have to forbid US social networks as well.