Smart. Motorways are safe

I’m not sure if motorway driving is taught as part of a car test - when i did mine I’m sure learners weren’t allowed on motorways?

My nephew did a pass plus after passing his test because it lowers insurance premiums and I thought that was a decent idea because it opens them up to situations like motorway, driving in the dark, bad weather etc etc. But it’s optional. Maybe something like that should be made mandatory?