If you happen to have a kernel installed that has the virtual provides for wireguard-modules, then dkms won't be pulled in.
$ dpkg -s linux-image-generic|grep wireguard-modules Provides: virtualbox-guest-modules (= 5.13.0-28), wireguard-modules (= 1.0.0), zfs-modules (= 2.0.6-1ubuntu2)
If you happen to have a kernel installed that has the virtual provides for wireguard-modules, then dkms won't be pulled in.
$ dpkg -s linux-image- generic| grep wireguard-modules guest-modules (= 5.13.0-28), wireguard-modules (= 1.0.0), zfs-modules (= 2.0.6-1ubuntu2)
Provides: virtualbox-