Line Follower Sensors

 https://www.amazon.com/OSOYOO-TCRT5000-Infrared-Reflective-Photoelectric/dp/B07C69N65P/ref=sr_1_2?crid=218XPWLPUOIPD&keywords=line+follower+sensor+arduino&qid=1689298110&sprefix=line+follower+sensor+arduino%2Caps%2C77&sr=8-2

OSOYOO 10PCS TCRT5000 Infrared Reflective IR Photoelectric Switch Barrier Line Track Sensor Module for Arduino Smart Car Robot with 5 8Pin Female to Female Jumper Wires

Method 2: Huskylens AI Vision Sensor: