can't get signed by org yet

the org registry is not as yet (unless I'm out of date) offering to sign records of arbitrary members. When it does, either it will sign everything (in which case Fedora need take no special action) or it will advertise that this is available as a new service and some sysadmin at the Fedora project needs to get in touch. But right now it's "friends and family" testing only, if you didn't get an invite, they're not interested.

SEC spider shows the Fedora Project's DNSSEC records as live and not a testbed service, so evidently they're not as completely under the radar as you imagined.