I checked a few re-sellers who generally have a ticket ... no lunck. The place does sell out early. Doubt that this has anything to do with it, but 6 December is Mikulás-nap (Saint Nicholas Day).
.... in "Hungary the tradition is that it is not him, but baby Jesus or/and angels who place presents under the tree on Christmas Eve. But that does not mean that Santa does not come at all to Hungarian children! There is in fact an entire day dedicated to celebrating Santa in Hungary. The Hungarian Santa Claus, called Mikulás (from the Slavic version of Nicholas, Mikuláš) brings presents, mostly sweets and nuts, ahead of Christmas Day, on 6 December (or rather, on the night of December 5)." https://www.hungarianconservative.com/articles/culture_society/mikulas_hungarian-santa-claus_december-6/#:~:text=There%20is%20in%20fact%20an,the%20night%20of%20December%205).