I was testing some mods for use on a server, and i was intending to use the cities dimension as part of the world, without having any cities spawn in the main overworld. The method that used to work (the bed on two diamond block, surrounded by skulls) doesnt do anything at all

oh, aw man :(
thanks for letting me know tho

I strongly recommend updating to 1.16.5. 1.15.2 is old and no longer getting updates

It's not implemented in 1.15.2