Organizations today have multi-generational workers. Leaders with Baby Boomer characters often have millennials or even Z-generations, or even more younger-generation followers.
These intergenerational conflicts must be addressed and managed properly in order to be more productive work climates.
I would suggest that a mentor is someone who offers wisdom, insight and advice and also, a role-model who can connect their "mentee" with people in their networks. They credibly do this, through having sufficient experience which does take time to accumulate. That said, with people changing their jobs and career directions much more readily these days, age is probably not the determining factor - a younger person with sufficient experience could mentor an older person who has just moved to that field of work. The dynamic is reversed, if I understand what you're saying correctly, but differing generational attitudes will still be present. Regardless which way around the mentoring and age differentials are, each party will need to be aware and manage that dynamic for a successful mentoring outcome.