Fruit trees can take a very long time to mature and grow flowers/fruit. Hopefully it can pollinate with itself, and isn’t a kind that has sexes.

Worst case you can clone it and GMO it into a different sex. Wouldn't be easy or cheap, but it's definitely something that's possible.

Cloning is likely. Finding more seeds unlikely. The plant hasn't flowered or grown fruit yet so the story insult over yet...