When creating an image for arm, i.e. using:
  architecture: arm64

and running
$ ./bin/openshift-install agent create image --dir ./cluster-manifests/ --log-level debug

the output indicates the the correct base iso was extracted from the release:
INFO Extracting base ISO from release payload     
DEBUG Using mirror configuration                   
DEBUG Fetching image from OCP release (oc adm release info --image-for=machine-os-images --insecure=true --icsp-file=/tmp/icsp-file347546417 registry.ci.openshift.org/origin/release:4.13) 
DEBUG extracting /coreos/coreos-aarch64.iso to /home/bfournie/.cache/agent/image_cache, oc image extract --path /coreos/coreos-aarch64.iso:/home/bfournie/.cache/agent/image_cache --confirm --icsp-file=/tmp/icsp-file3609464443 registry.ci.openshift.org/origin/4.13-2023-03-09-142410@sha256:e3c4445cabe16ca08c5b874b7a7c9d378151eb825bacc90e240cfba9339a828c 
INFO Base ISO obtained from release and cached at /home/bfournie/.cache/agent/image_cache/coreos-aarch64.iso 
DEBUG Extracted base ISO image /home/bfournie/.cache/agent/image_cache/coreos-aarch64.iso from release payload 

When in fact the ISO was not extracted from the release image and the command failed:
ERROR failed to write asset (Agent Installer ISO) to disk: cannot generate ISO image due to configuration errors 
FATAL failed to fetch Agent Installer ISO: failed to generate asset "Agent Installer ISO": provided device /home/bfournie/.cache/agent/image_cache/coreos-aarch64.iso does not exist

4.13

every time

1. Set architecture: arm64  for all hosts in install-config.yaml 
2. Run the openshift-install command as above
3. See the log messages and the command fails

Invalid messages are logged and command fails

Command succeeds