Expose Fields to Meta API Endpoint

Hi,

I am hoping to update properties via the wordpress api, but in order for this to work I need to use this plugin https://ww.wp.xz.cn/plugins/rest-api-meta-endpoints/

Having tested out I can not get the fields e.g. price to show in the meta end point e.g.

https://yourdomain.com/wp-json/wp/v2/posts/POSTID/meta

Please can you tell me if this is possible and if there is another way. From what I know in order to update a custom field you need the wordpress ID number for the field.