An EU controlled app would be allowed in the US as none of them are foreign adversaries.
Half joking, but the US performs corporate espionage in the EU and certainly takes compromising material on EU politicians whenever it can get it.
The slavish adherence from EU NPC politicians (they are mediocre and no one knows how they manage to rise) to US directives has to have some reasons. Being compromised is one of those.
The reason that the EU "adheres to US directives" is mostly just a legacy of WWII and the Cold War, you don't really have to posit any kind of nefarious espionage scheme to explain why European countries want to stay connected to the US economy and military.
From the US side it may look like that, but the EU doesn’t see it that way.
Lovely precedent we just set here.