Want my bum to look bigger in jeans

[BrilliantBetty]

Is there anything I can do?
Any jeans to make an ass look a bit (or a lot) perkier and curvier.

I am slim and in my high waist 'mom' jeans my butt is as flat as a pancake.

Heya OP you don't need to change your body shape. It's all in the pocket placement of your jeans. If you Google jeans pocket placement or look on YouTube there's tips there.
I remember reading a blog where a size 12 tried on loads of different pairs of jeans and her body shape looked so different in all the pictures!!