[CMB]

To give her more to do in her tank. You could add some cardboard tubes, bendy bridge(s), a platform and a digging area/box with deep substrate.

Hiding food/scatter feeding means your hamster has to search for food which takes up more time than eating from a bowl.

The igloo lets light through, so a wooden house would be nice and dark.

A potty is also a good idea. It makes cleaning easier. Once a pee corner is chosen. Put some substrate in the potty and add a bit of pee'd on substrate in the potty. The smell should attract the hamster to use the potty.

She may be easier to tame outside of her tank.