Hey Sofia,
Welcome to the community
I moved your question that you posted in the other thread here.
When you say a custom label can you give me more detail on what you mean?
Is it a label on a rich text?
Or just a label for selecting configurations? Because if it's that's your use case the label are just strings in a select field which is what you can add in a static zone. This field can be your configuration options selector.
Let me know if that helps.
Thanks.