Add button should be hidden or disabled if the count of Competency is One

Summary:

We would like to restrict the primary competency to be only 1. How to I disable or hide the add button once one value is entered in primary competency section

Content (please ensure you mask any confidential information):

The competency section allows multiple values to be added. But we would like to restrict it. How can we achieve this business requirement

Version (include the version you are using, if applicable):

24A

Code Snippet (add any code snippets that support your topic, if applicable):