He doesn’t intend to win this election by votes and his plan doesn’t need votes in the future.
Johnson will refuse to certify the results of the election that put Democrats in the House, claiming some kind of bullshit irregularities with no proof, leaving the House controlled by the Republicans. They’ll then claim irregularities in the presidential election and force a contingent election where they have a 100% chance of electing Trump no matter what the public votes. The worse that Dipshit Don loses, the stronger his argument about the vote being stolen will be, and the more his ravenous shitheel base will eat it up.
More people need to be made aware that this is 100% legal for them to do, and more people need to be aware that it is almost certainly what they will try. The only thing that can possibly stop it is significant awareness by the mass population of Americans and significant publicity (similar to how mass awareness of Project 2025 turned it into a poison pill).
EDIT: Oh look, they've already started making it super-legal in battleground states: https://www.theguardian.com/us-news/article/2024/aug/06/georgia-local-election-boards-allowed-withhold-vote-certification
There is nothing in this world I would love more than to be wrong about this, that's for sure.