Okay, I understand now.
So the solution is:
On the site where the feed comes from you have to set the radio button in the Reading settings RSS feed option from Full text to Summary. With this the feed what is generated by wordpress will contain the featured images.
Thank you for your help.
Do you mean on the woocommerce shop site which I want to show on the blog(linked page)? On the woocommerce page every product item has an img tag. Could it be anything else?
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This reply was modified 4 years, 6 months ago by gerypatay.