Hello,
01. I have checked your website and the URLs for both pages are currently using the normal WordPress permalink structure:
* Shop: /shop/
* About Us: /about-us/
We are able to access both pages correctly, and they are not using the ?post_type=product or ?page_id=65 format.
Please clear your browser and website/server cache and check the pages again from your side. If you are still seeing the old URLs or receiving a 404 error, please provide an exact URL where it occurs so we can investigate further.
02. Navigate to Theme Settings > Page title > Change the background image. These settings will be used for all page titles.
Also, if you want to change it only on the specific page, navigate to Pages > edit page > scroll down to Page Settings and check the Page title settings and upload the image.
https://xtemos.com/docs-topic/options-for-pages/
Best Regards