My godson is living a parallel life to your son, apart from the moving abroad, it’s pretty similar, he did finish university with a pretty poor degree, that was ten years ago, and he hasn’t done a days work since.
He applied for jobs in the first year, for which he was woefully under qualified, and then just seemed to give up, he lives at home, isn’t lazy, spends a lot of time gardening, which he’s become good at, has not a single friend, has never applied for benefits because he has a small trust fund, and at 32, leads a very strange life, never had a girlfriend, or boyfriend and is socially very awkward
My friend is worried sick about him, but just doesn’t know how to snap him out of it