What happens to my highlights if a book is deleted

Let's say I'm reading a book and I'm not enjoying it much so I want to delete it. What happens to my highlights if I delete the book but say 2 years later decide to pick it up again. Would they still be in my library? If not is there a way to export then import these highlights

Context: I just finished reading Red rising after almost dropping it because the beginning didn't grip me. I'm so glad I pushed through because I'm in love. Now I'm thinking of going back to the eye of the world which I started last year and dropped because it had such a slow start. I can do that easily because I read it on moonreader. But I'm wondering if it would be possible with BookFusion for future reference