We don't know if it would've been given as a foul because the offside takes precedence.
Offside isn't subjective. There's no reason why an offside decision should ever be wrong now.
But many fouls are subjective. If a foul is given, the ref/VAR will only consider overturning the decision if it's proven there was no contact.
VAR isn't there to review the ref's subjective decisions purely on the basis they could be viewed differently. That's the nature of subjectivity.
I can't think of one decision that was wrong yesterday. Certainly not any big ones.
Does that mean I like how things are done? Or course not.
But it's important to remind ourselves that we, as a sport, decided that 95% correct decisions wasn't good enough. VAR has taken that up to about 98%, but at enormous cost.
We have heavily subscribed TV channels hosting programmes and segments called "Ref Watch". All Match of the Day talk about is ref's decisions.
The idea this has all been inflicted upon us makes me cringe. We've got exactly what we deserved and demanded.