The basic powerlifts are Deadlift, Overhead Press, Barbell Squat, Bench Press, Rows of all sorts - and maybe accessory things like curls and tricep push-downs. Maybe Pull-ups should be on the list but I consider pull-ups and push-ups to be technically calisthenics because they are body-weight.
Of course, your body weight is plenty of weight...
You rise from a chair maybe 100 times daily, but how often do you do it with 150 lbs on your back? Never. But if you do it with 100 lbs on your back now, odds are that getting out of a chair at age 85 won't be a chore. Powerlifting is not Body-Building.
There are plenty of heavy accessory lifts with which to fill an hour, but the powerlifts are the core for strength conditioning.
So the powerlifts are not functional so much in themselves as they are designed for total body power, and muscle and bone strength. Total body strength feeds indirectly into everything you do in life except, perhaps, endurance activities. Your fitness for mostly everything, energy level, general appearance, and posture. Men and women of all ages include powerlifts in their workout programs.