I've been researching the possibility of bots messaging users via Facebook Messenger without any prior bot-user interaction. Let's say I have the user's phone number and I'd like to reach out to them first using my bot, then continue the conversation if they opt-in.
The only thig I found is customer matching described in the following thread: Start conversation without user interaction in Facebook Messenger However, the link to documentation doesn't work anymore and in general all the info I've been able to found about it dates back to 2019 at best.
Was customer matching feature development dropped by Facebook? Is it impossible for bot's to engage in conversations with users without prior interaction via a Facebook page / messenger?