Connect Notion in Settings. Notion asks which pages Parley Notes may use; it only needs its own table.
Then, from any note's export menu, choose Save to Notion. The note becomes a page in a table called Parley Notes with the date, the folder and a link back. If you have no such table, Parley Notes makes one the first time.
Parley Notes will: save a page only when you choose Save to Notion and keep those pages in its table.
Parley Notes won't: see pages you haven't shared with it or change or delete pages it didn't make.
You can remove its access from Notion's own settings at any time.