There was already an issue on GitHub about this

I don’t know if this is a feature or not, but if it is, it’s not working for me. When opening a link that refers to a post or community it opens an in-buildt browser inside of the app, instead of ridercting me inside of the app itself. It’s a real pain when openig lemmy links and having to switch to a browser every time.

If this isn’t a feature, is it planned?