HELL NO.
Nobody conceded in Bush v Gore until 36 days after the election.
We are on day 71 and Trump still has not conceded.
Do the math on that. First time in history since presidents started the tradition of conceding that a sitting president has not conceded beyond 36 days and he is STILL going. Let that put some wind in your sails.
Trump isn't required to concede so he won't.
It shows that Trump is not following the "norm".