In fact In Nether world, many players will break through the top bedrock of nether to reach above it.They build Nether High-speed Transit System and some product machine in there. but the current nether map only show the world below the top bedrock.
In my submission ,add a module perhaps a map to show the world above the top bedrock

You can change that in the map-config however you like, please use our discord if you need support with configuring your maps :)