First, you can see this link directly below the account ID (blue) in the console. If it is not customized, it looks like this:
Therefore, the "m.me" link is defined by your Facebook page link. To change it, go to your Facebook page and click "About" on the left panel, then find the "Username" field in the "General" section, and click "Edit" to set a new page link.You just clickManyChat accountin" Set up "=>" conventional "inButton to refresh permissionsThe changes are applied. That's it-you are great.
Hope this helps!