Hi @antonia.alleyne ,
Welcome to the Atlassian Community!
I might not be the best person to answer this question since Zenhub is a 3rd party software and I don't know much about it. However, there should be ways to export the issues to CSV so that then you can import them into Jira by following the steps in the below documentation page (you can switch between Server and Cloud by using the buttons on the top right corner of the page):
Also, regarding how to export the issues from Zenhub to CSV:
I hope this helps.
Learn how to use two new reports for next-gen projects in Jira Cloud: Cumulative flow diagram and Sprint burndown chart. Ivan Teong, Product Manager, Jira Software, demos the Cumulative ...
Connect with like-minded Atlassian users at free events near you!Find an event
Connect with like-minded Atlassian users at free events near you!
Unfortunately there are no Community Events near you at the moment.Host an event
You're one step closer to meeting fellow Atlassian users at your local event. Learn more about Community Events