Personal AM/FM Pocket Radio Portable VR-robot, Mini Digital Tuning Radio, with Rechargeable Battery, Earphone, Lock Screen for Walk/Jogging/Gym/Camping

You are thinking of the old Sony Walkman radios which used the headphone cord as an FM antenna. I don't think you want a new one, they cost some money. Here is a cheapie clone... hey if it works it works: https://www.amazon.com/Personal-Portable-VR-robot-Rechargeable-Earphone/dp/B07YJBTSWY