Also Biden is the president Kamala
Yes, but Kamala is the vice president and, 4 years ago, Trump made it very clear that the vice president can refuse to certify the election if they suspect fraud. Given the low turnout of Dem voters the only rational conclusion is that Trump and the Deep State must have intercepted Dem votes and disposed of them. So Kamala can and should refuse to certify.

(N.b. this is not meant as a sensible suggestion but does expose the hypocrisy)