Hi Madhumita Chaudhary (Ingka Centers),
Greetings. Thank you for posting the thread in our community.
Based on your description, it seems you want to duplicate an existing list in the SharePoint.
If you are using SharePoint online, generally, you can select + NEW> List > select From existing list,thenyou canselect the existing list as a template to create a new list on your site:
Here is also the official support article as reference for you: Create a new list based on the columns in another list - Microsoft Support. You can also follow the steps in the article to create duplicate lists:
If you have further question about it, Please be free to contact and send feedback to me, I’m glad to help.
Hope you having a nice day.
Sincerely,
Harry | Microsoft Community Moderator