It's generally easy to line up the interviews, at least at big companies you can pretty much pick your interview date.
Then if you've done say 5 interviews (1 per day for a week), you can just wait for the first offer and use that as leverage to get the others to hurry up. Since they already have all the data they need.
I haven’t pursued it seriously so I don’t know how much you can hurry things along, but most of the interview processes I’ve seen are weeks long. Google even warns you up front that it’ll probably take on the order of months. So it’s kind of tricky to get them to all line up like that.
It's still valuable info. Like let's say you actually made it thorough all the rounds at Google per your example, and are 'stuck' in hiring committee. That's a huge signal to you that you are in striking distance of the level you interviewed for, even if you don't ultimately make it this time.
That means you can for example use levels.fyi number for that level at Google as 'something that applies to me'
Then if you've done say 5 interviews (1 per day for a week), you can just wait for the first offer and use that as leverage to get the others to hurry up. Since they already have all the data they need.