Chrome 90 DevTools Brings Core Web Vitals Overlay Feature
https://developers.google.comWith Chrome 90 looks like you can show an overlay for Core Web Vitals right from dev tools to better visualize and measure your page performance.
Launch dev tools, then open Command Menu (Control+Shift+P or Command+Shift+P (Mac), run the Show Rendering command, and then enable the Core Web Vitals checkbox.