A Featured Image on the Archive pages has a link to the image, if you need to remove the link you will need to just use the following filters –
// Filter to remove featured image link on Archive Page add_filter( 'astra_blog_post_featured_image_link_before', '__return_empty_string' ); add_filter( 'astra_blog_post_featured_image_link_after', '__return_empty_string' );
Note: Add the above filter to your child theme’s functions.php, here’s an article to help you Add Custom code.