I have previously had AdSense and Google Analytics linked, then I decided to upgrade to the latest Google Analytics 4 (formerly known as App + Web)
Under this new Analytics I have no AdSense data under my monetization tab.
Most suggestions online I think are outdated (or else there's something else going on), they suggest going to
Admin -> Account -> Property -> PRODUCT LINKING. However when I go there there is no option for AdSense :
In contrast, in the old Universal Analytics there is an option for AdSense
So how can I link AdSense to the new Google Analytics 4?