I've attached the output of `journalctl -u systemd-networkd -u
NetworkManager -b`

Just FYI, this is taken from a fresh VM with a basically default Ubuntu Server 
24.04 installation after installing ubuntu-desktop-minimal.
I had to push some workarounds in our production deployment and I encountered a 
new/separate bug affecting netplan config so it's just easier to reproduce in a 
clean VM. The primary issue remains.

Running `nmcli device status` gives the below:
ebiadmin@test24:~$ nmcli dev status
DEVICE  TYPE      STATE                   CONNECTION 
lo      loopback  connected (externally)  lo         
enp1s0  ethernet  unmanaged               -- 


> PS: I guess the expectation here would be for systemd-networkd to keep 
> managing the network+DNS (which it doesn't for some reason), until reboot or 
> "netplan apply" is executed. Is that how it worked on 22.04?

Yes this is how it worked on 22.04. networkd maintained network+DNS
until next reboot as long as "netplan apply" isn't executed.

** Attachment added: "network.journal"
   
https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/2097769/+attachment/5857420/+files/network.journal

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https://bugs.launchpad.net/bugs/2097769

Title:
  Installation of ubuntu-desktop-minimal breaks DNS

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