Hi Charlotte and Jeff,
Here’s a couple of pieces you should check out – Finore by Moving Hearts https://www.youtube.com/watch?v=2xTZcdoOjjs or The Storm https://www.youtube.com/watch?v=f5McFnKo_L0 – with the great Keith Donald on sax. His website is: http://www.keithdonald.com
I play tin whistle tunes on the sax sometimes. Only slight difference in fingering (assuming you’re coming from a standard D whistle) is you’re playing in the scale of D, so middle key F sharp on the sax versus third hole up on the whistle.
All best
Robin