Hello,
1- After contacting my hosting provider, he informed me that the server response is not abnormal on his side if the connexions are made from Europe (specifically in the country where the server is localized) and not from Canada, U.S… My target is in Europe so I take the answer even if it’s not totally satisfactory.
2- For the DOM, except delete sections (that I consider important) and rethink my page composition, I’m afraid that using a helpful CMS/Theme cause quickly complex/depth DOM structure + a lot of files generate (often not needed or fully used for some pages).
3- It ok for speed optimization wizard, lazy option was already aticved. But I think lazy option is only available on Xstore widget/element for product ; not on woocommerce/others widget/element. (see image: https://prnt.sc/5IGkMtIBVg5i).
Maybe I should, first, enable an option somewhere ? (Maybe here ? : https://prnt.sc/MKNd_ibkJmdd)
Thanks,
Regards.