The typewriter scrolling is not an advanced editing feature, I think, as IA writer is a minimalist editor so…
Hmm though IA writer is a minimalist editor, it is a native app developed in Objective-C, which is actually easier to achieve editing features because the code was in full control. While Obsidian’s editor is based on CodeMirror.js, it is limited by what CodeMirror can or cannot do, so it’s possible that typewriter scrolling is one of those not well supported by CodeMirror, implementing would be a pain in the ass 