It was a moon orbiting capsule, not a lander. It was scrubbed (a very common occurrence for spacecraft) due to an engine temperature anomaly, not failed, and I think it was pretty much entirely SpaceX's rivals in the ULA et al, who, to be fair, are just as bad in a slightly different direction. I'm not aware of any major SpaceX equipment being used on Artemis.

SpaceX can't even get its moon rocket into space yet. Which is gonna be an issue soon since the NASA lander is supposed to be a moon-variant of Starship