Sorry for the late reply to this email, I think I wasn't getting the emails for this group.
ClusterFuzzLite definitely supports i386 and x86_64.
I haven't seen anyone use it on something like aarch64.
It might be pretty hard to do this because you'd have to rebuild all the docker images (for aarch64 and so that clang will target that arch).
I did get oss-fuzz working on QEMU emulating aarch64
Is this something you have in mind? Or will this code be running directly on a non-x86 device?