If you can drive down to Makena and Wailea. Beautiful drive down there.
Also take a cruise to Lanai island. You can take a ferry from Maui’s Lahaina. You can see where the locals hang out in Lanai City and grab a movie and eat lunch at one of the resorts. If you want to stay overnight, stay at Lahai Hotel, very cute cottage like rooms. This is the island where Bill Gates rented out the whole island to get married and Calista Flockhart owns a home on that island as well. Theres a resort on Lanai where you can have lunch or dinner. Great views of the ocean.
Try to go up to the mountains before sunrise. It is the most spectacular sunrises we have ever seen! We still remember to this day. Bring a blanket and snuggle it is chilly, when the sun goes up, it is warm. It feels like you are walking on clouds. Just gorgeous.
Theres a restaurant I will have to look up, a great italian restaurant. I believe its called Sorrentos? I will double check. They have great food and the ocean is right there.
Enjoy Maui, We’ve immensely enjoyed it during our honeymoon and babymoon.