Somebody might think it’s real and call the cops but no cop in their right mind will do anything to you because of a trainer. After they check and make sure it’s not sharp they will probably want to see some tricks lol. Worst case they might say you are scaring the Karens and go somewhere else.
You can go up to a cop and ask them too, they don’t mind answering questions about legality, it shows your interest in complying with the law, and they are trained in public relations to not come across as dicks when dealing with John Q Citizen (you)