Hello, first of all, congratulations to your bestie on becoming a mother. You must be proud of her in your heart. Since she is your best friend, you should know her better. You can think about what she likes, preferably what she liked in her childhood, because first, she has a child, she should have a lot of feelings, and second, if you give her something she liked in her childhood, she will understand that you cherish your friendship and cherish every bit of your relationship. In this way, she will be more moved and cherish your friendship more.
Of course, you can also give her food, because pregnant women have very different tastes. You can make egg tarts, cakes and the like for her to eat. I believe she will like it. When I saw my sister was pregnant before, her best friend gave her egg tarts, and she ate several of them. The above is my suggestion, I hope it helps you.