Hello how are you? If you want to add modules to the Wazuh plugin, then you will have to explore the source code of the Wazuh plugin to see where and what are changes you need to do.
As you can imagine, modifying the source code of the Wazuh plugin requires some knowledge, and could be hard to know what changes you have to do.
If your goal is to create custom visualizations in a dashboard, I would recommend you use the Dashboard plugin to create a custom dashboard with your custom visualizations outside of the Wazuh plugin.
I have been looking into creating a new module and adding it to the dashboard similar to the GDPR module that can be seen. I previously did ask the question but it was not really helpful as it was only best for modification. I hope you can help. Thank you!