Service to auto-calculate stats from previous season?

Hi all! I've been the commissioner of a keeper league that's been in action since 2020. The 2020 season we used the NFL app for our league but switched to Sleeper in 2021 and haven't looked back. I have made a very comprehensive history/stat book, but one stat I lack in is each teams history of efficiency (points for/max points for). I can easily trace these stats back to 2021 on sleeper, as it lists your PF/max PF clearly. I've recently reactivated the old league on NFL.com, and can see the game scores, season PF, basically the whole league. Though I am unable to find a max PF stat for each team for the 2020 season. While I could calculate this by hand for all teams looking at the individual game scores/lineups and mathing it out, that would be incredibly tedious. Does anyone know of a way or service where I can automatically have this stat calculated for me?