Is someone using some old phone, but with a recompiled kernel, to support standard linux features, like docker? It's possible in theory, but still didn't found

Is someone using some old phone, but with a recompiled kernel, to support standard linux features, like docker? It's possible in theory, but still didn't found someone doing it. Seems that running docker in an old android repurposed as a server is still too much niche, unfortunately. Bonus if it can run KVM with hardware support, but I don't know if it's possible yet.