How to find your instances

In the left sidebar on the panel there will be a section called Games & Software under that you should see Minecraft: Java Edition. If you click on Minecraft Java Edition it will expand a list of instances you have installed on your service.

To manage an instance all you need to do is click on the name of the instance you want to manage and it will take you to the Console page of the instance where you will be able to navigate to the different management pages of the instance.