Disable Loading lazy for FIRST image in content & Disable Loading lazy for thumbnail

disable.php

<?php
//Disable Loading lazy for thumbnail
function disable_template_image_lazy_loading( $default, $tag_name, $context ) {
    if ( 'img' === $tag_name && 'wp_get_attachment_image' === $context ) {
        return false;
    }
    return $default;
}
add_filter(
    'wp_lazy_loading_enabled',
    'disable_template_image_lazy_loading',
    99,
    3
);

//Disable Loading lazy for FIRST image in content
add_filter('the_content', 'the_end');
function the_end( $post_content ){

	$pos = strpos($post_content, 'loading="lazy"'); 
   return $pos!==false ? substr_replace($post_content, '', $pos, strlen('loading="lazy"')) : $post_content;
	
		//return $post_content;
}