How to make a hyperlink when replying to comments?

Question

I often see this, where the reply goes directly to some profile.
(Before the reply, a link to the profile, signed with its name)
Guys, how do you do this?
When I write @, no magic happens.
If I write "@R🍁🇮🇳", it will be just text(
(In other discussions, the @ symbol was suggested)

When I click the "reply" button, I just write a new message...
Is there any convenient syntax, how can I link to someone?
And secondly, when you are linked, do you get notifications? o.o
(By email, for example)
Also, why do you need subscriptions in sololearn, do you get notifications from them? o.o

I use sololearn from a computer, could it be that @ only works from a phone or doesn't work in my browser?

Answer 1

Installing the app (and editing the comment!) gave me the answer to my question.
Here is the form of the hyperlink inside SoloLearn:
(user id="123456")Name(/user)

P.S., here you need to replace the round brackets with rectangular ones... if I hadn't done this, it would have become a hyperlink)))

Answer 2

Tagging users works only in the mobile app, and even then you can only tag people who have already replied to the same thread, or those whom you are following. And even then sometimes it doesn't work. :)