Ah that might have been it then. As others pointed out, they never had the keys in the emulator itself.

Dunno if Yuzu provided the game itself, or tools to extract the game successfully, but the main argument from Nintendo was still copy protection bypassing, which is illegal.

Actually now that I think about it, I’m pretty sure they also nuked the Switch dumping tools from GitHub long before they killed Yuzu for the same reason. All it did was extract the firmware and console keys, but it was enough to force the tools to be rehosted.