The reason why a re-ranked item may not show an attractiveness score in DRR will be because it is not in the top 100 results of the top 1000 queries.
Attractiveness scores are only displayed for the top 100 results for the top 1000 queries, however items can be re-ranked from anywhere in a result set. For example, an item that is returned in position 500 can still be re-ranked, but will not have an attractiveness score as it is not in the top 100.
You can read about what determines attractiveness score here.