I know you can use a Quest Link cable to play some things on the PC store and almost included it, but I didn't see Quest on the supported platforms for the store page and assumed it needed to be on there explicitly if it was going to work.
I'm now cross-referencing it with Lone Echo, which I know works on Quest 2 and 3 since I played it recently, and it also only says Rift and Rift S for supported platforms, so yeah Google Earth probably still works on Quest 3 via a Link cable, especially since it still has new reviews as of January 2024 on there. Haven't tried it myself though.
I'm now cross-referencing it with Lone Echo, which I know works on Quest 2 and 3 since I played it recently, and it also only says Rift and Rift S for supported platforms, so yeah Google Earth probably still works on Quest 3 via a Link cable, especially since it still has new reviews as of January 2024 on there. Haven't tried it myself though.