I found this GitHub - multiarch/qemu-user-static: 🌍 `/usr/bin/qemu-*-static`
A quick test allowed me to run arm32v7/debian:10-slim image on our tycho build server.
So I guess it is doable with our current hardware.
I found this article explaining how to publish a multi-architecture image. Or we could use buildx extension.
So I think we should welcome patches that would add any official architecture.