Google doesn't have a rule against publishing PWAs in the Play Store. In fact, they encourage it and made specific APIs and tools for it. https://developers.google.com/codelabs/pwa-in-play

I published mine years ago and it's awesome because I never have to touch it. I don't go through app review, I just update my site whenever and however I want, and my store listing just stays there. https://play.google.com/store/apps/details?id=com.darpinian....

I also published on the Windows store, which works similarly, but nobody uses it.