I am trying to add custom fields to either WooCommerce orders or (WebToffee) subscriptions.

While trying to add an AC field, Meta Box is not showing as an option even though I have created a custom filed in Meta Box.

As a workaround, I added the same AC field to the WebToffee Subscription page, but the AC field is not showing in the WebToffee Subscription admin page.

Please advise.

Thank you.