Mobile compatibility is theme-dependent.
Since you use a commercial
Extra theme and need support, please go to their official support channel. In order to be good stewards of the WordPress community, and encourage innovation and progress, we feel it’s important to direct people to those official locations.
Forum volunteers are also not given access to commercial products, so they would not know why your commercial theme or plugin is not working properly. This is one other reason why volunteers forward you to the commercial product’s vendors. The vendors are responsible for supporting their commercial product. Commercial products are not supported in these forums.
I recommend disabling the SG Optimizer plugin and contacting SiteGround’s support here: https://www.siteground.com/support
Thank you very much for your assistance. When I disable the SG Optimizer, it works well. That was the issue. I really appreciate.
You don’t need to disable the plugin.
I later found the issue inside the plugin settings. I Disable the “Defer Render-blocking JS” and everything was good. Thanks guys. Really appreciate.