Manually adding the Helix Plan URL field in Jira
If you do not want the Helix Plan Jira integration to automatically add the Helix Plan URL field to all pages in Jira, you can manually add it to the pages in Jira project you want to integrate with. You need to manually add the field if you are using Jira next-gen projects.
See the Jira help for information about adding a custom field to a screen.