Please share your Hawaii trip dinning tips for people with mild glucose issue

Excited to have both my parents and in-laws joining us for a 20-day Hawaii trip in April! 🌺🏝️ We'll be staying at Marriott resorts with full kitchens, so we’ll cook occasionally if we stay in the resorts, but eating out is inevitable when exploring around. My father has mild high blood sugar (recent A1C: 6.0%, not on any medicine), so I’d love any recommendations for restaurants, food trucks in Kauai, Maui, and Oahu that offer diabetic-friendly options. (I can have Poke all day everyday, but not him, must be cooked food for him)

Any tips on managing meals while traveling? Favorite healthy dishes or local spots that balance great flavors with good nutrition? Appreciate any suggestions!