Unable to clear cache of chrome or safari in mobile

I working on a Laravel project and I need to check responsive in mobile iPhone 6, 6s, 8 and Samsung A7 2017 I clear the browser cache of chrome and when I reload the page nothing is changed I remove every code in style.css in iPhones nothing changed again, I can't figure out where is the problem

the browsers are lastest version and have the same problem in safari