With all the cannabis seeds iv grown from iv never had a true twin, the rare times they have shown up here the consensus is to cull one of them. I have had twins, triplets and beyond with other plant most commonly from extra seeds in the hole sometimes on purpose, sometimes not and yes I do divide some plants, it is more common then one may think in the world of Botany and actually in some cases used to speed propagation of plants like coleus and dill to name a couple for example. Strawberries are divided not cloned and rarely grow from seed but there is a big difference between rhizomes and roots and after working with them you start to know the possibilities and limitations, where to push it and when to let it be. Cannabis has roots and autoflower roots don't like to be disturbed, I don't even ike transplant autos, shotglass of water for 24hrs to final pot is my preferred choice.
I personally would try to separate them at my house, Curiosity is my Jam and I have plenty of seeds, time and space. The first thing you need to answer is can you and do you feel confident to undertake the task with a steady hand? Second is can you afford to sacrifice both plants if it goes wrong? Like two plants sharing one tap root. If you answer yes to both of those questions I would be more then happy to walk you through the best process, if you answer no to either one then I would recommend culling one of them as it is the safest option. whichever way you want to go you need to do it soon as autoflowers are movers with a short time frame and both will suffer if left in the same pot.