These features are only available if you have an Office 365 subscription.
If you cannot find the features in OneNote UWP App, maybe they are the paid features.
The Paid Features
Insert -> Researcher
Researcher helps you find relevant quotes, sources, and images to start your outline in OneNote. On the Insert tab, choose Researcher. Type a keyword for the topic you're researching and Bing will create a list of results. Add the source to your notes, and the source will be added automatically.
After adding drawings, sketches, and handwritten notes on any page in OneNote for Windows 10, you can easily rewind and replay each ink stroke at any time, allowing others to see how your ideas took shape.
Write out an equation, and OneNote will help you solve it step-by-step. It's like having your own math coach.
Jazz up your notes and annotations with new ink colors like rainbow, galaxy, gold, lava, ocean, bronze, rose gold.