apt on 20.10 have a virtualbox package?
I see that
apt install virtualbox virtualbox-dkms has worked on previous releases but on 20.10
apt install virtualbox
Reading package lists... Done
Building dependency tree
Reading state information... Done
Package virtualbox is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source
E: Package 'virtualbox' has no installation candidate
apt search doesn't find anything like it.