Make the devel extension part of the main sysupdate tree
As @kailueke mentioned:
You can add drop-ins for the components (until the dbus service for updatectl is a thing), see end of this section: https://github.com/flatcar/sysext-bakery#consuming-the-published-images
... I think components only make sense for things that are not tied to the OS version. The regular dev extension is something I would put in the default component by enabling it through a symlink that points to the .conf file somewhere under /usr.)
Edited by Jordan Petridis