No, its all fine on mobile, it is ok to have it below content on mobile for me. The problem is on desktop. As i said all the post and pages shows sidebar below content. This problem doesnt affect home page and archive.
It s like the page.php template and single.php template have an incorrect div tag. But i dont find the issue in the theme editor.
I solved it by deactivating the CDN cloudflare, and passing to a private host. The cache was completely stuck because of the CDN. Emptying it didn’t work.
Thank you anyway for your support!
I forgot, on the computer, it is visible a 5 days ago versione of the website, but on the mobile phone it shows the website as it was a week ago.