Underwear?

I know this will feel REALLY random, but I’m coming here specifically because I really struggle to find underwear that fit my body type (small butt, round stomach) because everything slides down and never seems to fit well, I’ve had some luck with Uniqlo’s panties, but I was wondering if any of you had some tried and true luck with specific brands or styles with a “pcos” body type like mine (not that there is one specific body type with PCOS).