Contrary to previous reports, the Pixel 6a will not feature a Snapdragon 778G or the ISOCELL GN1 from the Pixel 6 series. Instead, the Google Camera app has confirmed that Pixel 6a, 'bluejay' will launch with a mixture of Pixel 5 and Pixel 6 cameras, along with the Google Tensor SoC.
https://www.notebookcheck.net/Google-Pixel-6a-Google-Camera-app-reveals-a-blend-of-Pixel-5-and-Pixel-6-cameras-with-a-Google-Tensor-SoC.581101.0.html