Hello @naveenkumarudp ,
Yes, the endpoint is currently read only, and we are tracking this update in the following two feature requests, the top one is directly related to creating a Plan via API and is linked to as a related issue of the second one that is a Ask from the portfolio Dev team as to what features end users want to see added to the portfolio API:
Hello Community! I hope you've been enjoying the 🍂Apptoberfestivities🍂 (I know I have!) The event is heating up next week with a series of virtual events that we're calling the 🍻🍂Partner App ...
Connect with like-minded Atlassian users at free events near you!Find an event
Connect with like-minded Atlassian users at free events near you!
Unfortunately there are no Community Events near you at the moment.Host an event
You're one step closer to meeting fellow Atlassian users at your local event. Learn more about Community Events