It's hard to tell if she got the curly/crinkled braid hair or if she set her extensions after they were finished. It looks uniformed so it may be set with hot water.
If it's a set, it's easy. Grab a few packs of Jumbo kanekalon braid hair ($1-$3 each) and have some mini or micro braids installed. Then you can have the braider set them by either braiding them into two pigtails and dip them in hot water or using rollers and then dipping.
Or you can maybe try:
Freetress Loose Deep
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Freetress Finger Roll
Freetress Deep Twist
Freetress Cozy Deep
It's easy to find Freetress photos on Google but that doesn't mean it's the only brand you should use. Lol. I think the same patterns/style names are available in other brands. Amazon has also been a good place for me to find crochet/braiding hair as well. GL to you!