This is rarely mentioned. Because of its design, Starship can't just go to the Moon, it first requires orbital refueling (from other Starships). NASA estimates they would need at least 15, but that was before the Starship payload capacity was downgraded.
This reminds me of a Discovery Channel show from about 15-20 years ago, called "Escape from Planet Earth" or something, where a solar disaster required evacuating a small number of people to a new planet, within the next 5-10 years, using modern technology. There were two projects, one public and one private, and the private one ended up exploding on the launch pad because it was rushed and over-engineered.
It's actually called "Evacuate Earth" by National Geographic, and I have a link
I found a YouTube link in your comment. Here are links to the same video on alternative frontends that protect your privacy: