Thanks for contacting us.
Our theme supports header image feature. This image is shown on the posts and pages after navigation bar. You can see in this link ( https://www.britetechs.com/demo/themes/hotelone-pro/about-us/ ) behind the About Us title on header.
You can configure this image by navigating Appearance >> Customize >> Theme Options >> Header Image >> And upload your new header image here. Click on top publish button to save this header image.
Kindly check your created pages and posts. Then you will see your header image on your site.
If you have any query then feel free to contact us. Also share your website URL with us.
Thanks & Regards,