Force removal of WordPress image sizes in urls and use the original image. This can only be used with the main Optimole plugin.

optimole-variation-removal.php

<?php
/*
Plugin Name: Optimole Tweak - Force removal of wp variations
Description: Force removal of WordPress image sizes in urls and use the original image. This can only be used with main Optimole plugin.
Version: 0.0.1
*/

 
function optml_post_process_fixes($html){
		$extracted_urls = Optml_Manager::instance()->extract_urls_from_content( $html );
 
		$urls = array_combine( $extracted_urls, $extracted_urls );
		foreach ( $extracted_urls as $url ) {
			if ( strpos( $url, Optml_Config::$service_url ) === false ) {
				continue;
			}
			if ( preg_match( '#(-\d+x\d+(?:_c)?|(@2x)|(-scaled))\.(' . implode( '|', array_keys( Optml_Config::$image_extensions ) ) . '){1}$#i', $url, $src_parts ) ) {
				$urls[ $url ] = str_replace( $src_parts[1], '', $url );
			}
		}
		foreach ( $urls as $origin => $replace ) {
			$html = preg_replace( '/(?<![\/|:|\\w])' . preg_quote( $origin, '/' ) . '/m', $replace, $html );
		}
		return $html;
}
 
add_filter( 'content_edit_pre', 'optml_post_process_fixes', 999, 1 );
 
add_filter( 'optml_url_post_process', 'optml_post_process_fixes',999 );
add_action(
	'init',
	function () {
		$types = get_post_types_by_support( 'editor' );
 
		foreach ( $types as $type ) {
 
			$post_type = get_post_type_object( $type );
 
			if ( property_exists( $post_type, 'show_in_rest' ) && true === $post_type->show_in_rest ) {
				add_filter( 'rest_prepare_' . $type, function ( $response, $post, $request ) {
					$context = $request->get_param( 'context' );
 
					if ( $context !== 'edit' ) {
						return $response;
					}
 
					$data = $response->get_data();
 
					// Actually replace all URLs.
					$data['content']['raw'] = optml_post_process_fixes( $data['content']['raw'] );
 
					$response->set_data( $data );
 
					return $response;
				}, 10, 3 );
			}
		}
	},
	PHP_INT_MAX
);