Multiarch works fine for me with colima and Docker CLI:

    $ limactl shell colima uname -a
    Linux colima 5.15.68-0-virt #1-Alpine SMP Fri, 16 Sep 2022 06:29:31 +0000 aarch64 Linux
    $ docker run --rm --platform=linux/arm64 busybox uname -a
    Linux d9daf296b930 5.15.68-0-virt #1-Alpine SMP Fri, 16 Sep 2022 06:29:31 +0000 aarch64 GNU/Linux
    $ docker run --rm --platform=linux/amd64 busybox uname -a
    Linux 34805057ef02 5.15.68-0-virt #1-Alpine SMP Fri, 16 Sep 2022 06:29:31 +0000 x86_64 GNU/Linux

Haven't tried with containerd/nerdctl but I think it should work just fine too.