DeThat would presumably be because it has never been a target for them to achieve.
So why in February 2017, did Space X announce they were going to fly two space tourists on a trajectory around the moon and this was going to take place in late 2018?
Then in 2018, Space X announced the Falcon Heavy, which was originally going to be used for the flight, was no longer to be certified for human transport. Instead, they were going to use a new rocket called Starship which was going to fly to the moon by 2023.
2023 came and went, but it wasn't kind to Starship, if you consider explosions unkind.
Leaving explosions to one side, Starship's proposed payload also appears to be being cut back. So not only has Space X failed to date to do what was announced in February 2017, but it looks like it may not be able to carry enough fuel to do the take off and land bit safely.
Even if you don't consider Space X's 2017 announcement as a target, or the bollox Musk has spouted about Mars, as targets, Space X did successfully win two contracts for lunar landers. These I believe anticipated a crew joining Starship from a space station called Gateway and Starship would then take them to the moon, land and later return the crew safely. The first was awarded in April 2021 and was due to have a launch date of September 2026. But even the American government realises this date is a pipedream because of problems with among other things, Starship. - It only managed to finally achieve its trajectory orbit in March 2024, but then destroyed itself.
I believe it is proposed to convert the mission to unmanned, presumably on safety grounds.