https://www.cnet.com/news/spacex-falcon-heavy-rockets-into-history-and-nails-the-landing/

Falcon Heavy's center core landed on the SpaceX droneship.

SpaceX planned a landing of the rocket's side boosters on pads known as Landing Zones 1 and 2, while also aiming to bring the center core down gently on the floating Of Course I Still Love You droneship.