Hi @Chris L ,
Well both environments have api's so if you are comfortable with creating a script yourself you could write it.
Othewise I'd say you'd need to look towards an app.
One of which I know is Exalate https://marketplace.atlassian.com/apps/1213645/exalate-jira-issue-sync-more?hosting=cloud&tab=overview (but it's not the only one that exists)
If you can explain your use case a bit more in detail perhaps other solutions might also be possible. (maybe even linking the environments but if there is more automation needed I feel an app might be the way to go)
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