javascript:(function () { var script = document.createElement('script'); script.src="//cdn.jsdelivr.net/npm/eruda"; document.body.appendChild(script); script.onload = function () { eruda.init() } })();

maybe this'll work for you. it shows the inspect source value if you don't have it enabled either by any administration by anyone or if your device just doesn't have any inspect source button.... nevermind. it seems that you went mexis classroom as well for the coding...