No company should be immune to valid criticism. Microsoft was forced to add a browser pop-up on their OS, because it was considered they were abusing their market position.
Of course, retaliation is expected, but Apple has been so inconsistent in their application of the rules that every decision they've ever made is going to be called into question.
And you can be sure if there is even a hint at favouritism or revelations they've given certain partners special deals (that perhaps Epic wasn't allowed but Amazon was), then they are well and truly fucked.
The EU is not going to mess around. They are going to question every single decision Apple has made, and will make a substantial report into their conduct especially the effects on EU business and the economy. If the EU announces they are investigating you, you should be very, very afraid, they do NOT mess around and will absolutely be at the least issuing a rather substantial financial penalty and changes you will be forced to make within the business (and the OS).
Just look at what they've done to Google in the past few years, this is going to be no different.
I expect huge changes are coming for Apple in 2021 and I think we'll all be better off for it.
So sure, take the actions/steps you want, but be prepared to really defend them, and hope you actually have a case that is applied equally and fairly to all.