Google's next-generation flagship Pixel 7 series is not expected to launch for a while yet. Still, a third-party case maker has begun selling cases for the Pixel 7 and Pixel 7 Pro, showcasing largely unchanged designs.
https://www.notebookcheck.net/Google-Pixel-7-Pro-Third-party-cases-are-already-orderable-for-Google-s-next-generation-flagship-smartphone.617699.0.html