There are something like 30k votes not yet counted in Pima County where Biden has gotten something like 60% of the vote, which means Biden might increase his lead by about 6k votes. I don't know if these are mail in or absentee ballots or some precincts that haven't turned in their in person balloting on election day, but the thinking seems to be these will break about 60-40 for Biden.
There are about 400k votes in Maricopa County which are mail in ballots received on election day. Although Biden leads Trump overall in Maricopa County by about 6 points, mail in ballots received in the 3 days preceding election day broke about 53-47 for Trump. If the remaining 400k votes break the same way, Trump will pick up about 30k votes but he needs to make up 90k votes plus whatever he loses in Pima County.
There may be a few other votes to count in other counties but there doesn't seem to be enough to make a difference.
Maybe those Maricopa County votes will break 65-35 for Trump but there's no evidence to suggest why they would.