question about google analytics, sitemap, and multisite

I have about 10 blogs running on a multisite. I need to report all of them to one google account. I have plugins that register my analytic ID and sitemaps but my question is, do I need to set it up on the main site only, or every single instance of WordPress? I notice that the sitemap for the main site does not go beyond the main site. Is it a problem to transmit the 10 blogs sitemaps to google or have 10 blogs reporting to one ID? They do not reside on separate sub domains, but are: https://domain.com/blog1 https://domain.com/blog2