Can we somehow send notifications to the user in social media when new comments appear on the site if he logged in through his profile?

Question

PHP

Purpose: the user has logged in, posted content, we plan to notify him of new comments. We thought about the channel for sending messages to social media.
For example, VKontakte creates emails of the form [email protected], according to the idea, sending letters to this email should display a message in his profile in the message section.