According to a report by LetsGoDigital, Google applied for a patent for an under-display selfie camera implementation a while ago. Supposedly, that could mean the company equips the Pixel 7 series with the technology later this year.
https://www.notebookcheck.net/Google-Pixel-7-Filed-patent-may-indicate-an-under-display-selfie-camera-for-Google-s-next-gen-flagship.589593.0.html