Bug#931173: Configuring static networking via NoCloud with Network Config Version 2 does not work
Is there any progress in getting 19.3 into stable? I can see it was not part of the Buster 10.3 release.
If this takes any longer I'd suggest to backport the initially mentioned patch.
This is included in cloud-init 19.3 which is currently in Sid/Testing,
and as our current plan is to backport 19.3 as the new version for
buster-proposed-updates, this may be solved with this upgrade. Let's
wait and see what the stable release team says.