Just FYI, it looks like you shared a link to migrate the guides content, my query is more related to sites (Author instance) customization.

Thanks for the reply @TarunKumar But is it recommended to port the same dashboard from old AEM to AEMaaCS author instance? Any documentation around the suggestion like not to customize the dashboard or can be customized with some caveat?

Recently we have come across a requirement to migrate an application from AEM6.3/6.4 to AEMaaCS.Existing application has heavy customization done to the site's navigation. Three levels of navigation from sites interface. Let's sayLevel 1 > Tools,Level 2 > Tool1 till Tool 6Level 3 > each tool has dif...