> I think what we really need is legislation to force all phone manufacturers to at least make the batteries and screens relatively easily replaceable.

We are slowly getting there, user removable/replaceable batteries are part of the following regulation (first link I've got)

https://www.brownejacobson.com/insights/compliance-obligatio...

The big caveat will be that some leeway is going to be given to "waterproof" devices. Remains to be seen how many producers jump on that angle to avoid serviceability.