Bill is with ESPN+ now (bleh) and as a result most of his content is behind a paywall (mostly the rankings) though he does post a lot of nuggets to his twitter.

I found a Reddit post that said he will not be sharing a spreadsheet this year. If that’s because of ESPN+ and if it’s true or not I have no clue, but that’s what I found.

If that’s the case, you may find the following to be of some minor help. I’m not sure what exactly you need from Bill’s spreadsheet and I don’t know if you’ve used this site or not, and it’s confusing to navigate but good info/charts can be found.

https://collegefootballdata.com/data

And some rudimentary SP+ visualizations:

https://collegefootballdata.com/sp

Their trend tool is a lot of fun too:

https://collegefootballdata.com/sp/trends