You are using LXD with the images: remote which pulls the community images from https://images.linuxcontainers.org/.
Due to recent changes in distrobuilder (which is used to build the community images) it now appears that VMs from the images remote are running the incus-agent when in fact they are still running the lxd-agent hosted by LXD, as it just symlinks incus-agent to lxd-agent:
Canonical only provides the official Ubuntu images using the ubuntu: remote.
So for example, the official Ubuntu Jammy image would be used as follows:
lxc launch ubuntu:22.04 c1
These include cloud-init and so are equivalent to the /cloud variants from the images: remote.