So you only need to look to Shopify, Proton etc and their extensive lobbying efforts.
If we're going to assume it's the evil lobbyists controlling the narrative, let's at least do it right.
EU IT industry including key startups have been heavily lobbying EU to advance their interests against US companies.
It’s not unique to EU and not exactly a secret.
And I'm an Apple customer who is pushing for this. And writing this very comment from a Mac Studio connected to a Pro Display XDR while my MBP sits on a stand next to my iPhone and iPad, and my Apple Watch on my wrist.
We are not homogenous, and this borderline conspiracy isn't useful.
Most Apple users don’t care about third-party stores or even know what that means. The ones that do and also want it aren’t big enough to lobby so it’s companies with something to gain that are doing to lobbying. Nothing conspiracy about that.