The Perseverance Rover has found the kind of rock that it was sent there to find. It's exactly the type that holds microscopic fossils.
If there’s a Holy Grail on Mars, it’s probably a specific type of rock: A rock so important that it holds convincing clues to Mars’ ancient habitability.
Perseverance itself isn't returning, but it does collect sample canisters that could be. The canisters would need to be transferred to some future mission currently named "Mars Sample Return"