Registering your instance on the network
You need to login to your admin site and find the "Core > Fediversed Instances" section, there you should see a list of instances that your server already knows about.
If it isn't listed already, it is a good idea to add "https://fediverser.network" as an instance
You can then go back to the main page that lists all the instances, select the instance you want to submit your own instance to and trigger the "Register own instance in selected instances"