Are you quite certain? Google pushed a non-downgradable final update to the Pixel 6a. I was able to install Graphene on such a device. Lineage was advertised

Are you quite certain? Google pushed a non-downgradable final update to the Pixel 6a. I was able to install Graphene on such a device. Lineage was advertised and completely incompatible, but some hinted it would work.