Hello @naveenparmuwal
As I mentioned before, We are not sure how Jnews theme handles custom templates for AMP pages, so it will be best to take guidance from them.
We will provide you guidance considering you are using Legacy theme, but they might not be fully applicable because of custom templates by JNews.
Regarding your logo, we saw that below CSS is affecting your mobile view.
@media only screen and (-webkit-min-device-pixel-ratio: 2), only screen and ( -o-min-device-pixel-ratio: 2/1), only screen and ( min-device-pixel-ratio: 2), only screen and (min-resolution: 192dpi), only screen and (min-resolution: 2dppx)
.amp-wp-header .jeg_mobile_logo {
background-image: url((unknown));
background-size: auto 40px;
}
Remove the background-image: url((unknown));
it should fix your logo issue, if you want to change your logo, please refer to our documentation
you can try using the amp_post_template_css filter to add custom CSS to your legacy theme, You can learn more about it from our documentation
We hope this helps!