That definitely isn't the case and there's no law or policy regarding that lol, the reason in Into the Spiderverse is that it's an alternate universe NYC. But there are plenty of recent/still-running media that are explicitly about(fictional characters in)the real-life NYPD, like Law & Order or Brooklyn Nine-Nine.
Yo man, the references your AI brain is sourcing that answer from are Reddit threads about the spider-verse movie. That doesn’t give weight to your case.
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u/erikgfrey 19d ago
I think they started that after 9/11 in all shows and movies. That way costumes can't be confused with actual uniforms.