In the 20210617.n.0 Rawhide compose - the first after systemd-resolved was split out from systemd - live images (and so systems installed from them too) do not include the systemd-resolved package. Traditional installs seem to include it. I believe this may be because systemd itself Provides: systemd-resolved , so perhaps when building live images that provision satisfies the @core group requirement for "systemd-resolved". This Provides: seems to be a leftover piece of preparation from before the subpackage was split out, it shouldn't be there any more. I will do a new build with it removed. The consequences of this are obviously serious - networking is effectively broken. This violates all sorts of release criteria (e.g. package install/update requirements), so proposing as a Beta blocker.
systemd-249~rc1-2.fc35 fixed the broken networking for me.
yeah, openQA is happier again too, so I think my change did the trick.