The logfile when creating and starting nodes are stored at
/Library/Logs/Multipass/multipassd.log and is helpful when debugging why a node will for example not start.
When you create many nodes the assign dynamic ip (192.168.64.xxx) can sometimes need to be reset. This is most easily done byt first stopping all instances and then delete the file /var/db/dhcpd_leases
Never ever use a systemctl daemon-reload in a cloud-init file. This will kill the SSH daemon and the multipass connection to the starting node will be lost.
The list command (multipass list) have an undocumented option --no-ipv4 to exclude the IP in the output.
The cloud instantiation is recorded under /var/lib/cloud in the node. If a customized node is not working this is a good place to start troubleshooting. For example, in /var/lib/cloud/instance/scripts/runcmd is the run commands specified in the RunCmd extracted as shell commands.
Uninstall multipass by running
sudo sh "/Library/Application Support/com.canonical.multipass/uninstall.sh"
or
brew uninstall --zap multipass
Find available images mp find