Cloning/duplicating sharePoint site

Hi there,

We have a SharePoint intranet site (using the modern communication template), there is talk of the site needing a redesign/changing on menu etc. Is there a way of cloning/creating a duplicate copy of the entire site, so the users can make/experiment with making changes/redesign etc and not affecting the main/actual site? There is no option for save template for modern communication template.
Thanks in advance