Incus is great. I've been trying to revive an unmaintained ansible collection to manage incus resources https://github.com/sbstp/ansible-collection-incus

I don't if you know this, but there was a collection for LXD. Last time I checked, it didn't seem very popular so not maintained very well but it did work. Maybe that could be used for inspiration.

I remember Stéphane worked on adding support for incus containers to opentofu which seemed more popular than using ansible to describe the resources.