I don’t know how common it is but both of my bunnies started eating more when they started maturing, Glenn used to leave a bowl of pellets till the evening, now it’s lucky if they are still there after an hour. Veg that used to last a day is also gone very quickly.

I wouldn’t give her any extra, and I would start limiting pellets and veg if you haven’t yet usually one egg cup of pellets is enough. If she eats it all in one go that’s fine because she has unlimited hay to munch if she gets hungry but if you give her more than she needs it can cause serious problems for rabbits due to their delicate tummy’s.

It’s likely just part of her maturing especially being an unspay female. Occasionally odd behaviour can be a sign of an underlying medical issue so to be sure you can always ring your rabbit savy vet for a bit of advice or if she shows any other symptoms i.e lethargy, toileting changes, drinking changes or any other odd behaviour then book her in just to be safe.

Most buns are food oriented anyways, some just take a bit to discover that xD

I know you think you should feed her more, but don’t bunnies literally have an endless pit for a stomach, and you’ll find yourself with a chubby bunny and a bunny who has learned how to control you. A good rule of thumb is 1 cup of greens per 2 pounds of body weight, and now that she’s 6 months old if she’s under 5 pounds feed 2tbsp pellets and over that 1/4cup of pellets.