While desktop Safari supports the Notifications API (https://notifications.spec.whatwg.org/), mobile Safari doesn't. Notifications are needed for Google Search, as outlined in https://bugs.webkit.org/show_bug.cgi?id=182566#c58: "Google Search sends a notification once search results are available following a background sync event: https://web.dev/google-search-sw#meaningful-offline-experience and https://twitter.com/jeffposnick/status/1141849366094929920?s=21."
+1 hopefully this gets addressed
<rdar://problem/84280745>
<rdar://problem/84280779>
This is actually: <rdar://problem/84280745>