Did Trump say “Elon / Musk” at Daytona Beach, Florida?

Yes. Said at 8:28:36 PM ET, flagged live 0.59 seconds after the word.

“Is not in fact elon omar the one that she used to get elected in sworn into Congress”

From Saidwire’s live log of Trump rally · Daytona Beach, Florida. All 9 words said at this event.