iPhone 8 plus home button setting

I don't believe you can turn it off completely, however you can set it to the lowest setting. Go to Settings>General>Home Button, and then choose 1, that is the softest. The haptic is the only way to verify that you have activated the home button, since it is not an actual physical button. That is the only thing that makes the button appear that it has been pressed.

Feedback to Apple goes to http://www.apple.com/feedback/iphone.html

While I am not debating her desires to change, you may wish to explain to her that without that haptic feedback, there really is no way for her to know that she has activated the home button. At this point though, feedback is the only alternative since it cannot be deactivated.

“ there really is no way for her to know that she has activated the home button”

Strange answer.... as the required response ie change on screen is sufficient to know you’ve activated the button.

I also hate the feel of it, and am very disappointed that Apple has created such a clangky element on the phone. Disgruntled to say the least :-/