HELP – Slow loading on smartphone

Good evening,

I have an annoying problem hitting my website.

I performed several speed tests and, after optimizing all the components of the site, I managed to obtain quite satisfactory results.

I noticed, however, that trying to enter the site from a smartphone, the search engine loading bar stops for about 5/6 seconds before loading completely.

Obviously this is not good at all.

The problem only manifests itself on smartphones.

I have found that the problem is not caused by the server: it has very good response times.

The site is not yet indexed on search engines… could this be causing this delay?

Thanks a lot to those who will help me to solve this annoying problem.