Your local animal control, police non-emergency line, or a nearby vet are your cavalry. They handle this stuff daily. Seriously. They have protocols for dead cats. That’s a real job.
Call and ask: “Can you pick up a deceased cat from [location]?” They might charge a fee, or they might do it for free. Ask about costs before they show up. Nothing ruins a good deed like an unexpected bill for “cadaver transport.”
If the cat is near a road, call your city’s public works. They usually deal with roadkill. Yes, it’s bleak. But it’s also efficient. You’re helping prevent a second tragedy for another animal or a distracted driver.