how to add multiple loction in job schema

Hello,

Thank you for contacting Rank Math and bringing your concern to our attention.

If you want to have multiple locations in the job posting schema, it’s currently not supported on the Free version of the plugin.

If you upgrade to the PRO version you can follow the below guide to create a customised job posting schema with the help of our schema generator :
https://rankmath.com/kb/schema-generator/

Or you can use the below filter and customize it according to your needs:

/**
 * Collect data to output in JSON-LD.
 *
 * @param array  $unsigned An array of data to output in json-ld.
 * @param JsonLD $unsigned JsonLD instance.
 */
add_filter( 'rank_math/json_ld', function( $data, $jsonld ) {
	return [];
}, 99, 2);

Hope that helps. Thank you.