The rest of the MacBook is working totally fine, so would be good for use with an external monitor. I believe it has a loose connection internally. None of these affect use. I’ve tried my best to show in the photos (e.g. bits circles in green).
Apple Macbook Air 13" M1 A2337 - 8GB - 256GB - Space Grey -Screen Spots SEE PICS
Apple MacBook Air 13” - M1 3.2Ghz (2020) 8GB RAM - 256GB SSD - Space Grey - Good
Apple MacBook Air 13" M1 3.2Ghz 8GB 256GB 2020 One Year Warranty (Ref: SC)
Apple MacBook Air 13” M1 2020 | 8GB RAM | 256GB SSD | Rose Gold |Good Condition
Apple MacBook Air 13” M1 2020 - 256GB SSD 8GB Ram - Grey - 94% Battery Health
Apple MacBook Air 13" M1 8GB 256GB SSD Rose Gold 2020 Backlit Keyboard