Wrote a small php
code that can add the thumbnail or feature image in the Neve theme.
// Add the feature images into the content before the first paragraph
function add_single_feature_image() {
echo '<div class="entry-thumbnail">';
?><?php echo the_post_thumbnail( 'medium_large' ); ?><?php
echo '</div>';
}
add_action('neve_before_content', 'add_single_feature_image');