exercises like squat, deadlift, barbell hip thrust, and lunge are normally hard to perform for a lot of people, especially people with issues like low stability and balance, flexibility, injuries, or lack of strength. also because they are compound movements, it is really hard to isolate glutes and train them to fatigue.
that is why we need other exercises in order to add size to glutes and shape a nicer butt! I have already covered why cable leg extensions and abductions are not the best choices on some of my youtube videos, but just as a recap, because of the high amount of momentum and stability required for those exercises, and also an insufficient range of motion, they are not that much powerful.