I have the 2tb and yet not even remotely close it it used up but if u got to my iPhone storage it says it’s full how do I get more storage

The physical storage on the phone is different than iCloud storage. You cannot add to the phone storage. You need to delete content to make space available if the phone storage is full.

This will explain the difference.

What's the difference between device storage and iCloud storage? - Apple Support

See this about storage on the phone.

How to check the storage on your iPhone and iPad - Apple Support

If you have upgraded iCloud storage and are seeing a message on your device that storage is full then it is possible you are not making the best use of iCloud storage and need to use optimization features. If you do have optimization activated then it is possible you are exceeding your device's needs in terms of on-device storage and you need to buy a device with more storage.

Click on the link to learn how to optimize the storage on a device --> "How to check the storage on your iPhone, iPad, and iPod touch" - How to check the storage on your iPhone and iPad - Apple Support

- "If your device is low on storage, it automatically frees up space while installing an app, updating iOS or iPadOS, downloading music, recording videos, and more.

To make more storage available, your device can remove some of your items, like streamed music and videos, files in iCloud Drive, and parts of apps that aren't needed. It also removes temporary files and clears the cache on your device. But your device only removes items that can be downloaded again or that aren't needed anymore."

Here's the same information as a video: "How to free up space on your iPhone, iPad, or iPod" - https://youtu.be/bnhuHSv_WrI