The answer to whether the GOP, meaning Trump, will try to steal the 2024 election seems obvious.
They will bury the system with hundreds of lawsuits. They will work hard not to count the vote in districts Trump will lose. They will try not to certify election results.
They will try anything to throw the decision to the House, where they have an arithmetic advantage, because it votes by state and the GOP controls more states, though they represent far fewer voters.