Hello @Lena Post
Welcome to the community.
When you say the "whole" Jira project do you mean you want to clone all the issue in it also?
Are you working with a Company Managed project or a Team Managed project?
There is no single process native to Jira Cloud that would allow you to clone a project including both its configuration and its issues. Suggestions for 3rd party apps or other multi-step processes to accomplish this depend on the type of project with which you are working.
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