These links are live updated so totals may change over time...
https://www.realclearpolitics.com/elections/live_results/2020/state/pa/president/
Currently per RCP (link above), less than 50K votes separate the two candidates in PA, it would not take "widespread" or "systemic" fraud to overturn an election result with so few votes separating the candidates.
Current vote separation is: 49,153
And in GA the difference is much smaller: 12,651 votes separating the candidates.
Link:
https://www.realclearpolitics.com/elections/live_results/2020/state/ga/president/
Arizona is still counting, and the vote difference there is: 14,733 as I type this post.
https://www.realclearpolitics.com/elections/live_results/2020/state/az/president/
This idea that fraud or irregularities would have to be "widespread" when so few votes separate the two is simply untrue and an attempt to disregard evidence. It would not take "widespread" fraud or irregularities so large to be called "widespread" to change the result.