The deadline under PA law for the county boards to file their returns with the SOS is November 23. So they have another couple weeks where they can be non-committal, but by then they have to stand by the “numbers” they’ve found. A cynic might say that all this pressure for Trump to “concede” is to make it so the counties in these states don’t have to actually meaningfully attest to these numbers, i.e., to take away the threat that the numbers could be challenged. There’s no reason whatever for Trump to play along. Make them vouch for the numbers.
It looks like the earliest date for certification by a state SOS of the counts in any of the swing/contested states is Georgia on November 20. So November 20 is the earliest date anyone has to actually commit to any of these counts, rather than just talking about them or putting still incomplete numbers on their website. Until then, all this is just talk and noise. There’s still 10+ days for a SOS to blink.