Hook for sending product data

[beginner1]

Hi I am creating a module in which I want a button to be placed on the product page below Add to Cart button. I have tried the product addition info hook but that places the button in the same form in which the Add to Cart button is present. I want a seperate button not in that form since my module has its own form that will be sent somewhere else. Which hook should I use to achieve this? I am using prestashop 1.7. I have tried displayReassurance hook but it isn't working. Maybe it doesn't work in the prestashop 1.7