Welcome to Atlassian Community.
You can check this 3rd party plugin: https://marketplace.atlassian.com/apps/1222408/jira-two-way-sync?hosting=cloud&tab=overview
Note this plugin is intended for Jira cloud integration to other tools such as Basecamp.
You can reach out to the app developer for further details about the app - contact details can be found under the support tab.
Theodore
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