The EU very regularly fines European companies. AFAIK there is no statistics showing a preference towards investigating American companies. Though that is certainly the case for large software companies, simply by due to the fact that there are more of them and with larger revenues than European ones.

Have you any evidence, numerical or otherwise, to substantiate your assertion?

The EU doesn't want big tech out. It wants big tech abusers out.

And guess what, most of those big tech abusers are American.

But if it helps with anything, it doesn't look too kindly upon Chinese companies, either.

It can't really do much about European big tech companies since there aren't that many left... and they're in enterprise markets where things work completely differently (enterprises can sue you themselves very efficiently if they're disadvantaged, thank you very much).