I need to remove all other devices to have access to my phone accounts except my phone

Understood100 wrote:

I need to remove all other devices that’s connected to my account but the only way should be connected to my account is my phone which is a iPhone 13 promax

see this Apple article: Check your Apple ID device list to see where you're signed in

https://support.apple.com/en-us/HT205064

You are going to have to go into greater detail on what you are trying to do and use specifics on the devices.