First of all, congratulations to your friend. It is indeed a very happy thing to have a baby. It is also necessary to send a gift to congratulate your friend. As for what the gift is, it depends on the local customs. You can ask some elders at home, because in some places, friends who have a baby can only go to congratulate after many days.
My suggestion to you is to call and greet first, then explain the reason to your friend, and then make up the gift when the child is one month old. Moreover, it is easier to buy gifts for children of that "age group", such as pure cotton clothes for children, toys that can attract children, etc.
There are also some other gifts for congratulations, such as some gold and silver trinkets, longevity locks, zodiac pendants, etc., which are face-saving and commemorative. Gifts that can bring memories are the most precious!
Of course, don't forget to send a red envelope. Having a baby is a very happy and festive thing. Red envelopes are necessary, which is also a custom in many places.