metaAds.privateReplyToPageComment sends one private Messenger message from the Page to the person who wrote a comment.
automations/meta-ads-private-reply-to-page-comment.automation.ts
text accepts up to 2,000 characters. Optional second argument { account } selects a static project account binding.
Returns recipientId, the person’s PSID, and messageId. Meta returns error 10900 when the comment already received a private reply and 10903 when the person can’t receive one. Private replies aren’t replay-safe. The action needs pages_messaging and pages_show_list.