For me, the most affirming things are the simple, personal items that cis women take for granted and/or that I might have dreamed about but felt guilty over, such as underwear (bras and panties).
Also:
A female razor, for legs, underarms, etc.
Foundation or blurring primer - makeup basics
Sleepwear!
Camis/tank tops
Cute socks
Deodorant or perfume
Maybe a magazine intended for women
Colorful things, like a lavender or yellow water bottle. Men aren't supposed to have colorful things, even if they like them. Women (such as your spouse) are allowed to.
Basically, anything that's considered female-coded and off-limits to men.