All signs point to Biden winning the Philadelphia absentee ballots by a lot over the next 24 hours, and winning Pennsylvania by at least 100,000 votes. And that gets Biden to 273 electoral votes without any other undeclared states NV, AZ, GA or NC.
See below. Trump is up by 130,000, but there are about 600,000 absentee ballots left, mostly from urban areas, and Biden is winning them overall 80% to 20%:
By a cautious estimate, Biden will net over Trump at least 200,000 votes, and will win Pennsylvania by about 100,000 votes by Friday.
There is no legal basis to stop this count, and the margin will be too big for any recount to make a slight bit of difference, or to need to count pre-election postmarked/late arriving ballots under the legally vulnerable state Supreme Court extension.
So this is the winning map: PA gets Biden to 273 without AZ, NV or GA: