UP boards are supported by balena, but come with a configurable chipset. Does balena support the AMD versions?
You can browse the base images at dockerhub [1], and note that there are images for UP tagged x86-64 (that is, “AMD64”).
[1] Dockerhub search results - https://hub.docker.com/search?q=resin%2Fup&type=image&operating_system=linux&architecture=386%2Camd64