Hey, I don't know much about devicetree; there's an OSTree PR for it:
https://github.com/ostreedev/ostree/pull/2001
Mostly the people doing this work are using other distributions. I assume e.g. Fedora IoT
might be using devicetree. If anyone who knows about devicetree has a few minutes to look
at this and see if there's any specifics here that might interact with the Fedora/RHEL
ecosystem, that'd be appreciated!