I think the EU has focused on the wrong problems, namely, USB C. Whereas a truly open device must in fact provide a jailbreak switch deep in the settings app where users can freely toggle should they want less restricted access.
You’re welcome to jailbreak it. Go ahead. Apple doesn’t care.
What they care about is patching security vulnerabilities that are exploited both for jail breaking but also to bypass the secure elements of the phone.
Having manufacturers agree on a standard charging port wasn't about Apple. Shavers, smartwatches, LED lights, everything that usually comes with their own charger has to be compatible to the new standard. My bicycle light has USC-C now and can charge my mobile phone. Apple is just one of thousands of manufacturers and tech news gave the too much attention IMHO.
What you are asking for is full sideloading or at least alternative app stores.
Would that include cars and other devices which need insurance, to reduce the risk of harm?
Likewise whilst you could drive into a group of people and harm them, I guess you are unable to quantify the harm of your words or other people's words when communicating using devices.
You see many vulnerable people getting exploited into a variety of activities like religious terrorism, inceldom or working for the state. All of these claim to be for higher purposes, but the harm it causes is not always recognised.
Maybe if Apple and others explained what can and cant be done with their products it wouldn't be so much a case of Buyer Beware.