Trump can cheat. Well, at least he can try. From 2020 he should have learned that it is not actually that easy to do. But he has installed cronies in a variety of state offices where they can pull shenanigans similar to the fake electors plot.
Trump can (and will) call upon his buddy Putin for some reinforcement from Russian trolls who will spread disinformation all over social media.
Trump can keep foaming at the mouth with anger (which he seems to be doing a lot lately almost like he’s got a bug in his ear or something) and hope for some stochastic terrorism. If he manages to pull off Jan 6 2.0 except this time with guns, he will accomplish chaos for a few minutes until reinforcements arrive and wipe out the Gravy SEALs.