I regret not bringing pillows. Or a blanket. I had to use over ten hospital pillows and still not comfortable lol I brought a phone charger, and some gowns to wear afterwards so I could breastfeed easily and be comfortable.

I brought a robe so I didn't have the wear the gown and it made easy access to everything. Your own pillow if you want a comfy one. Same for towels when you want to shower; my hospital had towels but they were barely more than scratchy hand towels.

Chapstick. Lotion. Phone & charger. Something to distract during labor- picture. Ultrasound. (If needed)

Your own gown. More comfy.