Featured image ratio

Dear Support,

I have tried numerous ways to resize a featured image on a blog post with no luck. I’ve used the editor to change the image size but it only sets it to one size no matter what width I type. In a previous post “Bitcoin Pizza Day” I was able to change it to the size I wanted – but I can’t seem to replicate the design. This code below is missing on the image that I am trying to set, but is present on the image that I did manage to set at an earlier date.

srcset=”https://littlemissnestegg.com/wp-content/uploads/2023/05/InstaPost-1.jpg 673w, https://littlemissnestegg.com/wp-content/uploads/2023/05/InstaPost-1-300×300.jpg 300w, https://littlemissnestegg.com/wp-content/uploads/2023/05/InstaPost-1-150×150.jpg 150w” sizes=”(max-width: 390px) 100vw, 390px”>

Please may you help solve my problem

all my best
Eunice

The page I need help with: [log in to see the link]