The answer is yes you can, the method is to clone the existing install to a seperate parition or best, a different drive. Then configure boot manager to have them as different entries. You don’t even need to re activate the clone since it is on the same machine same cpu mobo etc. Clone an existing base install to a different disk along with uefi boot partitions. I have kept it for a year before not needing it anymore, I switched between both installs regularly.