WordPress Reader

New here – my apologies if this is a remedial questions.

I have my blog hosted with bluehost.com and use jetpack. The theme I use has a featured image and I set it. When I see my post in the reader all I see is the post heading; never any image. I am curious if the featured image is supposed to display. Anyone?

dantraun.com(https://traun-photo.com/dan) is the blog I am referring to.

Thanks!