A new feature is now added which is Facebook Subscription Messaging. Pages can send non-promotional subscription to their followers starting the 4th of March 2020, however, pages should be registered with the Facebook News Page Index. The Facebook subscription messaging can be used when the page wants to announce something new that is non-promotional, then this option will be the best one to use.
First the page must request to use this feature, and be approved to send subscription messages. This can be done through page ‘Settings’, then choose ‘Advanced Messaging’, Under ‘Subscription Messaging’ in the ‘Requested Features’ section, choose the ‘Request’ button.
If you would like to have this feature and use it for your page, just follow the steps to receive the approval, but first make sure that your page is registered with the Facebook News Page Index, by the 4th of March, you will be able to use this feature.