I mean, (modern) Angular comes with TypeScript support out of the box. It would be very difficult to use Angular without some TypeScript knowledge (it is apparently possible to use Angular with only JavaScript, but a lot of effort).
Our goal is to provide a free resource through which people can learn to code, yes. I, personally, would love to see TypeScript in the curriculum. However, at the moment it’s not the top priority.
As @ilenia mentioned earlier, we are currently focusing on the new data science and mathematics based curriculum:
As well as our project-based curriculum shift:
https://forum.freecodecamp.org/t/help-us-build-version-7-0-of-the-freecodecamp-curriculum