5 weeks is not enough time, it may take longer, like BunLuv says. And even if you desex a young animal, it will still go through some form of adolescence, which is a period of emancipation and becoming an adult. It’s a natural process not only driven by sex-hormones. I think she will become more chill eventually (well, they do), but I think you need to see her a bit like a teenager now. Teenage kids can be absolute nuisances, some more than other. It’s not just difficult for the parent/ pet owner, it’s difficult for the teenager/pet too, this period when many genes are shut off and other genes are turned on and the brain really is in rapid development.
You’ve done the best you can for her to ease her through this by having her spayed. Beware of putting stuff you care about where she can get to them, training a bunny not to chew stuff is seldom if ever successful. They don’t respond to humans in the same way dogs do.
As for the grunting, my bunny Yohio would growl at me for a long time. He’d growl and charge and box at me and then immediately put his chin to the floor for pets, so it often is kind of difficult to understand what a bunny actually wants. “No growling at mommy” I used to say. I don’t know if it made any impression on him, but he’s stopped the growling and now he just demands pets.