If you're planning to breastfeed then lanosin I wore tracksuit trousers and a giant t shirt home (classy!) Take food. Apart from the post birth toast I wasn't fed with no 2. Not sure if that's a thing now or they just forgot me.
Dressing gown - ideally black as it hides any 'accidents' iyswim Flip flops to wear in the shower
I had my bag more or less packed. I was missing a 'going home' outfit. Had DC 5 weeks early unexpectedly. DP brought my bag the following day. The hospital kindly provided everything I needed until then (incl. clothes for DS). I never gave my going home outfit a thought as I had gone to hospital in nice clothes. By the time I was allowed to leave hospital I had lost so much weight and water that I had to keep hold of my maternity pants as they would have dropped to my ankles. Also had to shuffle to the car in shoes that were a size too big as my feet had swollen so much during pregnancy. Luckily everyone thought I was walkig so slowly because I was still recovering from childbirth
I'm just out of hospital. Ended up being moved several times between wards which can leave you a bit neglected on food and drugs. On that basis I was pleased to have a long life tuna ready meal available (although I didn't eat it), snacks, super concentrated squash, paracetamol and ibuprofen. I agree with taking lip balm and would also have some tissues. Maternity pads and breast pads. Slippers/flip flops for walking around (although ffs not so useful if you end up in support stockings, I took crocs instead). Dark dressing gown. Muslins to provide extra cover if you breastfeed. Maybe head phones and a book to read.