and reading more into this i don't think i will be able to use it - old chromebook with no android app function
it seems chromebooks need android app function on since this feature will use google play services APK on both android and chromeOS to sync
i did enable the flag but nothing showing on my ChromeOS
more here if you wanna try it and have android app feature on chromeOS
https://9to5google.com/2020/09/15/chrome-os-android-phone-hub-everything-can-do/
no biggie for me as i prefer using Join android app/chromeOS extension which does the same thing but is fully encrypted with my own key
was just curious as to how it worked and stuff