How can I uninstall Apps on my iPhone 6

I am sorry, but it is not clear, what your question is. It sounds like you need help and uninstalling all of your apps. Is that correct? If so, you can find instructions below on how to uninstall apps. If you have another question, then please reply but provide more detail.

Remove or delete apps from iPhone - Apple Support

The iPhone 6, a phone introduced ten years ago, cannot update past iOS 12. Many app developers have made the choice to abandon iOS 12 and phones like yours that cannot update past iOS 12.

Therefore, If you need or want to run modern apps, it is time to replace the outdated iPhone 6 with a newer iPhone. Preferably one compatible with iOS 18.