Comment by JuniperMesos

I was able to get Waymo to work on GrapheneOS, but it took some doing, and relies on the GrapheneOS developers hacking around the official Google Play services in some way. Waymo definitely made it more difficult than it needs to be to run this on something other than ordinary Android, and it's unclear if they did so in order to make themselves more money, or simply because doing things the official Google Android way is easier for them and they aren't even thinking about people who are trying to have a less-restricted smartphone OS.