Chosen Solution

Can I put an iPhone 7 Plus button on an iPhone 6s phone? I have an iPhone 7 Plus that is beyond repair so I kept it for parts. My the home button on my iPhone 6s has stopped working so I was wondering if I could replace it with the button from the iPhone 7 Plus (even if the Touch ID doesn’t work).

no they are completely different

No. These phones use a different style home button with different chips on the flex cable and the iPhone 7 home button fits in through the front of the phone and then screws in on the back, while the 6s home button fits in through the back of the phone and uses a bracket similar to other older model iphones.