Donald Trump did not accept the transition. He agreed to pay the transition funds but he did not give up contesting. And he is right to contest the election since massive fraud took place.
A president who claims to rule the country on the basis of massive fraud is a president who has no legitimacy. A lot of people in the United States will continue to challenge the legitimacy of a hypothetical Biden administration. If Donald Trump accepted this it is for a very clear reason that he announces in his press release: Emily Murphy who is in charge of this has suffered threats, multiple threats. So he [Trump] preferred that the threats stop. When you threaten someone in an administration, you behave in an unworthy manner. And it wasn’t just there that there were threats. There is a very murky situation right now in the United States and it’s part of this very murky situation.
Disinformation about the US in the context of the US presidential election.
In its interim assessment on the conduct of the election, the OSCE finds that the contest was "competitive and well managed" (p. 1), noting that "evidence-deficient claims about election fraud" (ibid.) have been refuted by "election officials at all levels" (p. 3) and "national security agencies" (p. 11).