featured image uploaded but not showing

Can you please let us know which design theme you are using? and are you sure you have enabled the featured image option? so that we will help you accordingly.

I am using a swift design theme and I have seen the featured image option is enabled
and here are the advanced options also.
https://ibb.co/8nk2Nvg

Please follow the following tutorial for reference and let us know back if the issue still persists: https://ampforwp.com/tutorials/article/how-to-show-hide-featured-images-on-pages-in-amp/

Hello, Ahmed thank you for the help, as you said follow the above link I applied all the settings according to the given steps but the problem is not totally solved now I am getting in the post editor and on amp pages on posting. But now the issue is if you want to edit the image after posting the article same issue occur as before.

here is the screenshot https://ibb.co/nPLPd72

The issue might occur due to the conflict with the other plugins. Can you please check it once by deactivating the plugins on your site whether the issue is persistent? And Then let us know back.