I think it's generally true that Arm is more efficient and better for the environment.
There are 3rd party Arm images available and I'm running instances with these on AWS and Oracle, but they are not updated as frequently as the official images: https://hub.docker.com/r/masquernya/lemmy/tags
I know if I'm asking I should be ready to help, and I am. But this isn't something I know how to do.
I really do trust both of these projects and the community mindedness of their owners. Does someone know how you'd go about verifying a 3rd party image hasn't diverged from the official project image?