If there is an ongoing court case to determine the winner at any time in 2025, it's a no.

Other nos include armed conflict led by the non-conceding candidate, or the party of the non-conceding candidate largely supporting the notion that the election result has no legitimacy. (In 2020, Trump and his diehards rejected the outcome of the election, but the Republican Party accepted it, so applying my criteria to 2020 would've yielded a YES.