How about the UI of the user who tweet what would be data flow?

so let say that user post the tweet and it will be send to the fanout service to put the tweet to the friends db. But how will the data will be shown on the user who posted the tweet. Since the user will have the 2 page one is Home Page and user Page. Homepage is like where you can see al the tweets of others well but the same time user page is like you can see only the one that you have posted.
So I am guessing that UI will not do the backend call to get the latest post that it has done recently.
I am guessing UI will handle locally on the app side to show that that tweet to the user page instead of pulling that from backend. ?
Please correct me if I am wrong.