bedrock-viz VS Nukkit

You can use Bedrock Viz to get a map of your world to find command blocks. You just have to specify in the config that you want command blocks to be marked on the map.

You could run Bedrock Viz as per its instructions to see where the zombie villager is.

You can use the advanced options in https://chunker.app/ , or for bedrock specifically you can use https://github.com/bedrock-viz/bedrock-viz

As I understand, it isn't straightforward to do in Bedrock Edition. If you want a 2D map, I use bedrock_viz. You need a local web server to use the map's features because browsers no longer allow certain javascript functions to run from local files, the file must be served through a server, which is a hassle, but once you have a web server you can make the map public for others outside your network.

GitHub - bedrock-viz/bedrock-viz: Minecraft Bedrock Edition World Visualization & Reporting Tool with Web App

NukkitX by default doesn't have anything above 1.12 Mineacraft. It also doesn't have maps by default (though you can use a plugin for this). One other way to see is taking a look at the currently open GitHub issues.

I'm not the most well versed in Bedrock servers, but I think you could use something like Nukkit or PocketMine-MP for the mean time, as they should have 1.18.3 versions still up for download.

Is there any documentation on Minecraft bedrock server. How do Nukkit, PocketMine and potentially other server software figure out everything. Or is it just reverse engineering. If so, how can they update to new versions so quickly. All I could find was about addons and commands. (This) Or maybe someone's doing all the work on figuring out and sharing and all server developers just use it?