I would be surprised if this issue doesn’t get to the Supreme Court asap. A circuit court of appeals made a ruling a few days ago that says all ballots must be received no later than Election Day, but that only applies to certain states covered in that ruling. 

https://www.politico.com/live-updates/2024/10/25/2024-elections-live-coverage-updates-analysis/mail-in-voting-ruling-00185653