As a qualified PT, I recommend focusing on workouts like glute bridges, fire hydrants, donkey kicks and deadlifts if you want to build your butt quickly.
Bubble Butt and Thick Thighs (Ultimate Guide)
BIG BOOTY & LEGS WORKOUT PROGRAM - At Home – MiniBeast Enterprises, LLC
How to Get a Bigger Butt in One Week (Without Bulking up Your Quads)
How to get bigger hips and legs - Quora
8 Best Glute Exercises at the Gym
Best Pilates Booty Workout - Rachael Attard
How Big Should Men Build Their Legs?
How To Get A Bigger Butt Without Bulking Up Your Thighs
No progress after 3 months : r/StrongCurves
The 10 Best Exercises for a Bigger Butt
Do Squats Really Make Your Butt Bigger? - Steel Supplements