Hi Giacomo,
As I think I mentioned to you, we can’t really speak to what google thinks about your contents I did suggest to you the same thing I’d suggest to anyone who wrote in about it:
- make sure your build outputs a correct sourcemap, likely by downloading your build as shown in the screenshot (and following the instructions in) this article, to confirm the format is built properly.
- if not, debug your build
- if so, if you could share a link to your sitemap, I could take a look at our internal logs to see if there have been download errors.
- once we resolve 2/3, then if things don’t work, you’d need to contact google about how their service works.
Many customers use sitemaps from netlify successfully so I believe you can succeed and that this isn’t a general brokenness, and happy to help debug as far as we can on our service, once you get things started as described there.