IMHO, whether (and which) statue of limitations applies is a question of law, whether said time limit has passed is a question of fact. I'd like to read the jury instructions and verdict, but I didn't see a link to them anywhere.

I guess there could be a question of fact in a case where the statues of limitation differ for different injuries, and the factual question is which injury was it.

You are correct that which statute of limitations applies is a question of law. If facts are undisputed, that is the end of the issue. In this case, the facts were disputed, and the jury found for the defendants.

The jury instructions are public and the final jury form will be published, likely later this week.

I can tell you that the instructions told the jury to decide whether Musk could have brought his case before 2021.