There is no record of the post on Musk's X profile. There have been no credible news reports about the supposed post from Musk.

Elon Musk’s arm gesture, widely interpreted as a Nazi salute, during Trump’s inauguration event on January 20, has continued ...

Musk’s numbers are down, and even some who like him don’t seem to love him being so central.

Elon Musk. A name that evokes images of tech mogul ... appearing on Tumblr to 4chan. Sad Pepe, Smug Pepe, Angry Pepe—the frog became the go-to image to express literally any emotion.