Good news, this feature is partially done. :)
Planner tasks can now be copied to other plans. To copy a task, click on the “…” menu on the task. From there, you can select a different plan to copy the task to.
This is still being worked upon. I hope to have more details in the next couple months.
Please know the team is actively working on this feature.
I’m so happy to share an update with you! The feature team has let me know that they are working hard at this and are aiming for a spring time release.
Please comment below if you might be interested in testing or TAP, and include the industry, company size, and location of your org. We would likely want to hit a very wide range of demographics.