A single manufacturer convinced a lot of them to work with Apple phones.

It's definitely doable, but the product has to be appealing to users, which also seems doable as phones already peaked in capability and making a good phone now is more about polish in build + software than being technologically ahead of the competition.

I consider my 2yo mid-range phone a great phone, and with today's politics owning my phone is in the top-3 things I'd like my next phone to improve on, not a better camera, screen, battery, slimmer build nor gimmicky stuff (ok, maybe an IR to replace remotes or LoRa support would be kind of cool)