Cars and phones play very different roles in our lives. Phones have become the way we access the internet and the internet is increasingly at the center of everything so the considerations for regulation are different.
The idea that regulations and laws may need to change is separate entirely from whether the App Store is considered anti-competitive under current legislation.
Though I guess in the EU this amounts to “basically anything the court wants”. Much as I don't feel much for these companies, I also feel like these suits are often just shakedowns.
Anyone who thinks an open store is important can simply buy an android phone.