How to add cover image to my posts and make it visible on the current space they're in?

Hi! I am currently making spaces for my community, one of them are from classes that I will upload on youtube and then add them to the community as a URL link, but the issue I'm facing is that when I create the content and upload a cover image, this selected cover image does not show up on the space when I see all the post, instead, it generates an automated gradient image

like this:

(IMG 1)

instead of showing up like this:

(IMG 2)

Here it is the settings of the CMS model I'm using on both:

(Fields from IMG 1) - This is to add the videos to the space "Videos Library"

(Fields from IMG 2) - This is to add live events to the space "Live events"

Can someone help me fix that?