Off the top of my head - apprenticeships in healthcare, environmental health and safety, waste management. Civil service. Operations and logistics. Project management. Local authority apprenticeship schemes.
What research have you done - have you searched for graduate schemes, looked at top graduate employee, sectors etc? If you ask the university will give you a list of employers at their career fair, and you can have a look at what sort of jobs they offer. ‘Gradue sectors’ , targetjobs are a good resource.
Unfortunately for humanities graduates the majority of them are probably going to be in the things your son doesn’t like, such as ‘business’ (which encompasses a wide range of roles, so not sure what this actually means).
And I’ll also say this - a lot of people , even graduates just ‘fall into’ something they don’t particularly enjoy. And use it as a stepping stone. Some people never find a job they ‘enjoy’ as much as we’re supposed to. Work is work, you do it to enable a good life doing the stuff you actually want. If people won the lottery most would probably stop work.
It might be helpful perhaps to look at ‘attributes’ of a job. E.g does he like talking to people? Fast paced environment, or steady? Does he like being in the spotlight, or behind the scenes? And a ‘love/tolerate/hate/ scale. As a plan B if he cannot find something that clicks he can go with something that is tolerable and won’t be soul destroying.
There are a couple of good career tests that have been mentioned on these forums - Morrisby I think is one of them.