Currently the qemuarm64 and qemumips64 are supported by yocto. It's better to add these artifacts to the AB publish directory.
http://git.yoctoproject.org/cgit/cgit.cgi/yocto-autobuilder/commit/?id=8cd5383b92b69013ff16ee174d2c081d677c5d37
Verified with 1.9 M1 rc1