If you use https://www.linkedin.com/post-inspector, and put one of your links in (ex: https://www.timlrx.com/blog/how-generalisable-are-deepfake-detectors), the image is very low quality.

You can see in the network request for the image (https://www.timlrx.com/_next/image?url=%2Fstatic%2Fimg%2Favatar.png&w=48&q=75) , the size is specified as 48x75, which is much lower than needed for a social graphic of at least 1600px and 400px.