Bruno,
Try to install pipewire-v4l2 and v4l-utils with sudo apt install pipewire-v4l2 v4l-utils command (I believe you don’t have them installed).
after install reboot pipewire.service with systemctl --user restart pipewire.service command
and check again systemctl status --user pipewire.service to see if you still have these errors:
Run v4l2-ctl --list-devices command a post the result.
Thanks
Jorge