The constitution anticipates that a state or states may fail to send electoral ballots, or send conflicting sets. If THAT dispute results in inability to choose a POTUS, then the Congress picks.
The law likewise allows Congress to dispute a states electoral ballots. This has happened recently, John Kerry moved for this recently. Congress rejected the motion, but it (Congress) can reject a state's slate of electors.
Maybe the Michigan and Wisconsin GOP should formally challenge the vote counts at some point. We have videos of very suspicious activity. My guess is that SCOTUS doesn’t want to get involved. If the House decides each state gets one vote, as you know.