When downloading microshift OCI container images to create an offline appliance, the resulting downloaded OCI container images for the sriov images is huge with 4.7G, compares to e.g. core 1.5G or multus only 154. 
It seems that multi-arch images are downloaded, tho only x86 or arm64 would be required.     

4.21    

Always    

    1. Download the OCI continer images, following code snipped used to embedd container images into a bootc image, but not in the context of a Containerfile, simply on a shell command line (https://docs.redhat.com/en/documentation/red_hat_build_of_microshift/4.21/html/installing_with_image_mode_for_rhel/creating-a-fully-self-contained-bootc-image#microshift-embed-cont-images-bootc-image_microshift-install-bootc-physically-bound)
    2. repeat this for microshift core (e.g. release-x86_64.json), multus (release-multus-x86_64.json) and sriov (release-sriov-x86_64.json) into different folder.  
     3.check the folder size
     4.Compare the image digests for sriov x86 vs aarch using 
# cd /usr/share/microshift/release/
# diff release-sriov-aarch64.json release-sriov-x86_64.json 
    

images]# du -hs *
1.5G	core
154M	multus
4.7G	sriov    <<<<<< WAY TOOO BIG

# diff release-sriov-aarch64.json release-sriov-x86_64.json 
#
^^^^^ NO difference in images????    

sriov should be way smaller, and x86 vs. aarch release info should show differences.