sorry, and I am not trying to side with DonaldTrumpJR or anything but though I can see that he replied to your thread saying "message sent" do you have more screenshot confirming that the one you are talking to is DonaldTrumpJR?
anyway, so I did a quick search on the forum checking "telegram @PikoroSSJ" and there is one account connected to it
PikoroSSJ and the account went online and posted something about a week ago.