Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
Hi,
I am John and I'm here to work with you on this issue.
As of now, Planner is having the features to copy a Plan but Planner is limited to lock a Plan from editing and we understand how important this feature to you.
https://support.microsoft.com/en-us/office/copy...
You may give your feedback to Microsoft for them to be aware that this is a helpful feature for users who are dealing with the same scenario as yours. Hoping that it will be implemented as soon as possible.
https://support.microsoft.com/en-us/office/how-...
I hope the information helps you. If not, please reply back to this forum to let me know. I will be glad to follow up and help you.
Regards,
John