I Have A Plenty Active Pretty Healthy 5 Year Old

I have a plenty active pretty healthy 5 year old she will be turning six in February. My concern is she has always seem to have a "pot belly" but it seems to be getting bigger and bigger also she tends to be hungry almost every hour
She's always asking for food. I try to give her a variation of healthy treats but that will only hold for an hour or so. Her GP said she's in her 95% of her weight. And she is healthy but I'm concern it might be something more serious
I would like a second opinion from a pro