https://www.cnet.com/news/elon-musk-spacex-prepare-to-fire-starship-rocket-engine/

The moon goal is an important one. SpaceX and Musk announced last year that Japanese billionaire Yusaku Maezawa had bought up all the seats for a planned 2023 Starship mission to travel around the moon.

Musk says Starship will eventually have seven of the new engines. SpaceX currently has a "hopper" prototype of the stainless-steel Starship meant for takeoff and landing tests, with hopes of unveiling an orbital version by mid-year.