See images in category search

Hello everyone, I was just wondering something that I have been trying to fix for a long time with no success…
I installed Swell Lite, and I have been using it for almost 3 months now. The thing is that I dind’t really like how feature images work with this theme, so I didn’t just resort to use them. Instead, I add an image at the top of each post so that visitors can see the image below the title and then the entry content below the image.
I use categories in my menu to make a section. This is a food blog, so eveytime I post a new recipe, I use categories to catalog these entries, for instance, if I post a recipe of a breakfast, I add it to ‘Breakfasts’ category, and then if you go to the menu, you find ‘Breakfasts’ option, where you can click to find all the recipes in that category.
My problem comes when I click in the option in the menu. It shows all the recipes in the category. Nonetheless, it shows the title, and content but nothing of the image that I add inbetween.
The same thing happens with tags.

My site link is: https://www.celiaromero.es/mr.algaba/blog/
There you can see the images in every post (there is just one without an image so far).
But if you go to the search by categories: https://www.celiaromero.es/mr.algaba/category/recetas/desayunos/, you see there is no clue of those images..

Anyone here who can give me a hand with this?
Thank you so so much! Cheers!