[Grayson123]

Right now I’m doing glute bridges, one leg squats and donkey kicks.

[SweetO]

You won't grow that ways unless you make up a solid program. With a good program + eating well+ sleeping well eventually you'll see results.

Check out Bret Contreras' YouTube channel. He's the master of glute development.

[surferjoe2007]

For larger muscle size weight or resistance is helpful.  Creatine and HMB help too, as does carb loading before the workout to avoid burning muscle.