Pretty sure the Talkback thing is about technical constraints of some sort, not Google trying to keep it locked down.  I wouldn't be surprised if support for it required some sort of driver updates.

Doubt you're going to find what you want.  There's things like the Pinephone but they're not accessible.  From a technical perspective phones aren't able to be power efficient and small while also being repairable.   As soon as you try tio make the phone modular instead of a system on a chip the power requirements and size shoot way up.  There's no market for inferior products that are sold only because philosophy, so that generally just doesn't happen.  Maybe there's something but I wouldn't hold your breath.

Such is the way of the world I suppose. Hopefully at some point those of us who live in the states can finally passed the right to repair bill so that the market changes for the better.

Absolutely! There's the Fairphone, which I plan to get myself at some point. It got a 10/10 IFixIt rating, so yeah, pretty easy to repair. And you can order all the individual parts from their store as well, so if the screen breaks, you don't have to replace the entire phone. It's a pretty cool company, imo.
https://www.fairphone.com/en/
I cannot promise you accessibility; as I said, I don't have one yet. But it has stock Android. That's about as accessible as you can get.

Well, screen case and battery I would say. Batteries are definitely replaceable without having to remove the chip that powers your phone. At least, that’s how it was last time I remember. Unless, of course, we’re talking about the major companies like Apple, in which case you really have to hunt down a battery if you have any hope of changing it out without having to get an entirely new phone per Apple’s nearly forced recommendation.