JetSmartFilters Add option like '1000+' to check range

code.php

<?php

add_filter( 'jet-smart-filters/filters/filter-options', function( $options, $filter_id ){
	
	$filter_list = array(
		'269396' => true
	);
	
	if ( ! isset( $filter_list[ $filter_id ] ) ) {
		return $options;
	}
	
	foreach ( $options as $key => $label ) {
		
		$pair = explode( ' — ', $label );
		
		if ( intval( $pair[1] ) === 9999999 ) {
			$options[ $key ] = $pair[0] . '+';
		}
		
	}
	
	return $options;
	
}, 999, 2 );