Social Security maintains a “retirement earnings test” for people who claim benefits before reaching full retirement age (FRA), currently between 66 and 67 depending on your year of birth. If your work income exceeds a certain threshold, the Social Security Administration (SSA) temporarily withholds a portion of your monthly payment.

https://www.aarp.org/retirement/social-security/info-2023/working-and-your-monthly-benefit.html