You can try creating the Latest Posts through a GB Query Loop Block, alternatively, you can try this CSS:
section#wpsp-472 .wp-show-posts-image img {
height: 286px;
width: 100%;
object-fit: cover;
}
section#wpsp-472 .wp-show-posts-image {
margin-top: auto;
}
section#wpsp-472 .wp-show-posts-inner {
display: flex;
flex-direction: column;
}
For the single post images, you can use a Block Element – Page Hero, otherwise, you can try this CSS:
.single img.dynamic-featured-image {
height: 150px;
object-fit: cover;
}