Not sure. The real question is what the Google founders and board want and expect. Sundar is just looking after things for them. The reason he got the job is that he was never going to do more than that. But you might legitimately ask at this point if that's enough. And he's been there long enough that he could be replaced without anyone losing too much face. Surround it with some corporate euphemisms and get some fresh blood in and move on. I would not be surprised if they are already looking around.
It worked for Microsoft obviously. This is quite a coup for Satya Nadella. And he got that one on merit. MS has no stake in Android (they declined to get into that after killing Windows Phone). Also, he hit the ground running after Steve Ballmer was retired. Not that hard of course after Ballmer but he did a few decisive things early on that all seem to have mostly worked out. The Linkedin acquisition; fixing .Net, re-establishing MS as a bonafide OSS player with the Github acquisition and VS-Code. And then making a smart investment in OpenAI which they are now riding to success. All great moves.
I'd say, Google is in the same boat right now. Lots of obvious potential, an extended period of a bit rudderless performance, missed boats, and no clear direction or vision. Fix that and it could go somewhere else again. Doing more of the same isn't going to be anywhere near good enough. They seem to be stuck playing a game of whack-a-mole in terms of strategy and ever responding to what others are doing and never quite catching up with that instead of initiating things themselves and leading.