Web Core Vital Hasn't Changed

How long does it take for web core vital to update after using the Automatic Platform Optimization?

I used litespeed cache before and man I have been stuck with failing web core vital for 6 months, my traffic has decreased and lost alot of web rank… I gave cloudflare a try and omg the speed is insanely fast and all my web core vital show 99%, but as I run pagespeed insight, the search console still hasnt updated…