If you bought the Pixel 6 or Pixel 6 Pro, open up the Google One app.
It gave me a 3 month trial of Google One, and also offers me a discount for 6 months if I decided to take up membership (it ends my trial if I do though).
There's also a feature to do some advanced photo editing apparently? I haven't tried it yet, nor do I know why that's hidden behind Google One membership, but sounds pretty neat.
It's worth noting I've trialled Google One in the past, and let my membership lapse.
I got spam from Google today saying photo editing on iOS is locked behind "Google One".
It looks very basic.