This is the Memo of Understanding between Biden and the GSA and its director:
https://www.gsa.gov/cdnstatic/2020_MOU_between_GSA_and_Eligible_Candidate_%28Biden%29.pdfIt talks about determination of the
apparent winner of the election as being the point at which the keys to the kingdom get handed of for getting the transition under way.
We are well past the point at which there is an apparent winner. There is no obligation to wait for the formal president-elect status and, indeed, by contract an expectation that it will not wait that long.
Even granting the absurd contention that the election
might get overturned by overturning the results in 3 or 4 states, that does not change Biden's status as apparent winner.