Question
Is it possible to clone Service Plan that belongs to Plesk admin and move it to a reseller?
Answer
No. Currently, only manual copying of service plan under administrator's ownership to a reseller is supported.
Take a part in product improvement, vote for the feature request, leave your feedback, leave use-case description via the following link: Clone plans on customer/provider
The top-ranked suggestions are likely to be included in the next versions of Plesk.