This article explains how to change your caller ID on AT&T, T-Mobile/Sprint, and Verizon. But remember, if you are a saved contact in someone's phone, following these steps will not overwrite that information.
How to Change Caller ID on Android! (2023)
You can change your Caller ID name through the AT&T website. When you edit your AT&T Caller ID name, it may take up to 72 hours (weekdays only) for a landline to show the updated information, and it may not change until people delete your number from their Caller ID logs.
Open your myAT&T profile and log in when prompted.
Select People and Permissions.