How to add 2 maps to your Minecraft server?

I'm running a very small Minecraft server, created with aternos. I also have a Skywarsplugin and a Spawn map, but how can I add another Skywars map? As I said everything created with aternos

Well, if you have only one world, this is (as far as I know) completely impossible, since a map is an existing world.

You should take the multiverse plugin to create multiple worlds and pack a warp.

There are settings on the Aternos website. If you do not find them, you can contact Aternos support and ask.

Pardon you need of course a multiverse plug in or something that allows multiple worlds, as far as I know.