might well be, I had one Fedora box through toolbox, but deleted that. But they still appear, so thats ruled out too. I dont use homebrew that much, so I could try to remove it to see if that changes anything.
Also, Podman --help states that ps is to list containers:
ps List containers
I have removed all containers and images prior to this as I thought that was the issue, but it seems like it is not.