Yes, some AM4 boards support PCI.
Yes, some AM4 boards support PCI.
You're getting a pretty damaged board for a playful project. What nation are you from? In the U.S., a PCI TV tuner might stop functioning altogether.
Is this something you normally do? Or are you curious about it? Since it’s outdated and not very smooth these days, it might be worth a quick try for five minutes—you’ll likely get bored quickly. Worth it depends on what you’re looking for. I’ve found better options for around $60 called Manor Lords and Enshrouded.