Depressingly this feels like a long lost battle. I suspect internet freedoms will continue to be eroded and by the time most people care enough it’ll be too late.
My optimistic brain is hopeful for federated services to become the norm and stand up to this kind of crap.
I fear it is already too late, thanks to the phone duopoly and bulletproof secure boot environments. The EU can now make remote attestation mandatory by law.
We have to assume this is only the first step. The next step will be mandatory identity attestation for everything and your only choices will be to either accept it or not use any services at all.
The common user spends 7+ hours per day on their phone, has hundreds of apps installed which are all tracking and harvesting their data and personal information, regularly use at least 1 different type of social media or algorithm feeding app trying to alter their behaviour, probably are involved in at least 1 parasocial relationship with an influencer or content creator. And the common person sees that as the norm, doesn't believe it is contributing to any sort of mental health epidemic, or if they do acknowledge it, still can't resist it and improve their life.
If you so much as began talking about something like digital sovereignty, they'd bunch you with the fake moon landing and flat Earthers.
I have no hope in them.
Unless you can show a direct cause-and-effect relationship from clicking OK on some form to something negative happening in their real life that impacts them in actual physical real life, a real event at a particular time that they can observe with their eyes that relates to their real life (family, job, social life, going about their day), most people won't care. Otherwise it all blurs to some abstract words and theoretical tinfoil-like worries about the "government" and ufos and sovereign citizens.
How to make the normal person aware and interested in their own digital rights.
Start a revolutionary, reactionary movement. Many people wonder how the current US president was elected. Regardless what your political stance is, it's good evidence that if you can recruit a huge number of followers in your agenda (and in the process, likely make nearly as many opponents), and have them repeat your "propaganda" as much as possible, you can do anything. That's how you can defeat Big Tech.
Of course, to build a movement, you need a way to get people aware and interested in the first place...!
Tell everyone you know, tell them to do the same...
I have very little hope, that the common user will make use of their own agency avoiding a dystopia, or even think about issues associated with their behavior. We can see this everywhere even today. The majority of people are clueless and just accept whatever bone is thrown their way. Need to buy a new phone every year now? OK. Pressured to accept digital surveillance by not even state agencies but private profit oriented companies, that want to sell your data or use it for nefarious purposes? OK. Giving all your communication data to big tech? OK. ... It is all just a big "auto-accept any digital rape" for most people, as they don't even want to think about the technical implications and implications for society. It's all so far above their technological understanding, that they just exit the bus, when it comes to discussing these things. That is the problem we face. How to make the normal person aware and interested in their own digital rights.