If I set a featured image through YOAST plugin, it appears directly over the heading of my post. The image indeed shows up in the thumbnail but it also shows over the heading when you open the post page. Please see an example here – https://piercube.com/negative-beta-stocks/
Hi,
To hide the page header you can disable it from the theme customizer.
See here : https://prnt.sc/1lussyc.
This will remove the page header completely and show the post title after the featured image.
Hope this helped.
Thanks for using attire.