It doesn't matter when they register if there are safeguards in place to ensure that the person registered is the one actually voting.
Removing those security measures, then using mass absentee voting, and installing unaccounted drop boxes, and extending the time allowed to accept a ballot after election day is what lead to the 2020 fraudulent election.
I totally agree. However in those key states, no such safeguards exist. That's why they were able to do what they did. None of trumps team ever figured it out.
Any election integrity moving forward must be as focused on registration as voting, otherwise it's waste of time