Hello, @iZoe Soultions Pvt Ltd,
Alright, I have checked your site speed on Google page speed for mobile and it is very low see here: https://postimg.cc/2qpXC6c0 as you can see in the image the speed score and the reason for this speed are showing. Let me explain to you step by step.
1- First Contentful Paint: First Contentful Paint marks the time at which the first text or image is printed on the screen.
2- Time to Interactive: This is the amount of time it takes for the page to become fully interactive.
3- Speed Index: It shows how quickly the contents of a page are visibly populated.
4- Total Blocking time: Sum of all time periods between FCP and Time to Interactive, The first two points.
5- Largest Contentful Paint: Largest Contentful paint marks the time at which the largest text or image is painted.
All of these 5 points are necessary to optimize the speed score of a site.
Now, If we calculate your site speed then it will be clear that you must optimize the 1st, and 2nd points by doing these 2 points. 3rd and 4th points will be auto-optimized. Then you have to fix the “Last point which is (Largest Contentful Paint)”
The question is how you can fix the first 2 points. Let me tell you.
further, You can use the AMP plugin for mobile speed. XStore AMP (Accelerated Mobile Pages) is a plugin released to help improve the mobile browsing experience. It is created to render the page faster by only loading the text, media, simple styles without scripts and many styles that Elementor or WPBakery plugin generate, so it supports the WooCommerce page (because pages come with simple styles and texts) and does not support pages created Elementor/WPBakery.
Check this article also for AMP plugin: https://xstore.helpscoutdocs.com/category/112-amp-plugin
Now, let’s back to point number “5” which is (Largest Contentful Paint) as I can see on your site at first you set the banner most of the sites you see which are well optimized do not use the banner/slider for mobile because it takes time to interact on mobile. Instead of a banner/slider on mobile, they just use a heading with the paragraph because they are aware of mobile optimization of the site. If you optimized the banner/slider images then it will not affect so much but obviously, it has an effect on the site. Now it’s up to you to use it or not based on the majority of the plugins, customization, pages, and post on the site. Like the blog, portfolios, and sites that don’t have any much content, or plugins they can add the banner/slider on the site but other sites which use a multipurpose theme try to avoid these kinds of things on mobile.
Regards 8Themes Team.