Can I copy the typed-out text of a handwritten note?

Yes, if the note was made with Real-time recognition turned on (a per-note setting on the Supernote — it recognises your handwriting into text as you write; the app just reads that text, it doesn't do its own OCR). Open the note's preview and look for the copy-text button in the top toolbar (between the refresh and open buttons). If the note has recognised text the button is active — click it and the text copies straight to your clipboard, confirmed by a small "Text copied ✓" pill. If the note has no recognised text (it wasn't made with recognition on), the button is shown but greyed out, and hovering it explains why. The text is plain (top-to-bottom order); tidy handwriting copies more accurately than dense or multi-column pages.