It's the most clear example of fraud. Poll workers forging ballots and retroactively falsifying them into being valid. Updating databases to match what was on the ballot, putting in 1900/1/1 as the DOB etc etc.

Do we at least have this data for every state?

What's the mail ballot rejection rate now, and what was it two years ago or in other states with a similar population or similar number of mail-in ballots.

Btw why is it so hard to find simple data like the mail-in ballot rejection rate?