I downloaded SLES15-SP3-Vagrant.x86_64-15.3-virtualbox-QU3.vagrant.virtualbox.box from here: https://www.suse.com/download/sles/ and import the VMDK image.
It didn’t let me start fresh so I already have a user name and password set.
How can I find the root password?
Hi and welcome to the Forum
Unfortunately this Forum is for openSUSE not SUSE Linux Enterprise, you should join https://community.suse.com for these questions