Don’t think so, as Trumpism basically existed before Trump. It is like Nazi or Fascist ideology. It exists whether Hitler exists or not. I agree that Trump will not run in 2024. But a populist in his image will very likely run.
Trumps minions are not done with their hate and their blame game. They will look for a new hater-in-chief who can channel their anger towards minorities, gays, women, liberals, socialists or anyone not agreeing to their medieval vision for America.