I don't think I did even 5 hours of "classroom study" for my PPL back in the 90's. The CAA didn't care then & I don't see why they should in the future, either you acquire enough knowledge to pass the exams or you don't.
Oddly enough, the AMC specify that the syllabi & exams for the LAPL(A) & (H) should be the same as for the PPL(A) & (H) but there is no minimum study hours for the LAPL, only for the PPL, for exactly the same requisite minimum knowledge.