I had leggings and a very loose t shirt.
I didn’t bother with a bra before, take the sports bra you could be wearing afterwards, unless you are being bandaged.
Take slippers and a dressing gown for after the op.
Just wear home the stuff you wore in the morning it’s not worth messing around with extra clothes, pack as light as you can no make etc…. So clothes you are wearing maybe a new top knickers, sports bra, dressing gown n slippers 🙂