“Nothing Chats, powered by Sunbird, allows you to directly message other phone users from your Nothing phone via blue bubbles.”

I don’t think this solves the problem, but it is a step in the right direction.

    • As far as I know, SMS in India and Brazil is not free. This means that for majority of users switching to a data-based app is not so much as a choice, but a necessity. In the US texting via SMS has been free for several decades, so there’s no reason for people to look for an alternative.