There is a respond on their discord:

I am sure that there are different approaches to swaps in general. Please find my post from #support below in regards to cryptopia swap. If there is any new Info regarding this topic we will inform you.
"According to our lead devs, there are some Swap scenarios that need to be discussed with cryptopia. Since dcy is not the only coin that changed the codebase , this will be a Task there is no solution for yet , but we  already contacted them several times in Regards to this Matter with No Response from their Side. We think there will be some Response after the Registration process has been completed. I will Update you as soon as we have more detailed informations to Share."
for now , this is all informations i can share regarding this topic.