> If you disabled Web & App Activity in the Admin console, it is turned off for Google Workspace users. Users can turn it on if they want.
So nobody will be tracked on the web who wasn't previously. The setting that will be turned on is just the one controlling search history within Gmail, Docs, Drive etc.
(But it does seem surprising that they didn't just show a option dialogue on the next load of a Workspace app and ask the user to choose.)