How to display Featured image before entry content on Posts and Pages in Genesis. https://sridharkatakam.com/how-to-display-featured-image-before-entry-content-on-posts-and-pages-in-genesis/

functions.php

// Register a custom image size for Singular Featured images
add_image_size( 'singular-featured-thumb', 800, 250, true );

add_action( 'genesis_before_entry', 'sk_display_featured_image' );
function sk_display_featured_image() {
	if ( ! is_singular( array( 'post', 'page' ) ) ) {
		return;
	}
	if ( ! has_post_thumbnail() ) {
		return;
	}
	// Display featured image above content
	echo '<div class="singular-featured-image">';
		genesis_image( array( 'size' => 'singular-featured-thumb' ) );
	echo '</div>';
}

style.css

.singular-featured-image img {
	vertical-align: top;
}

@media only screen and (max-width: 800px) {
	.singular-featured-image {
		margin-bottom: 40px;
	}
}