I am not sure how cold hardy a duhat tree would be. I know they do great in the Philippines, we had a couple of large trees in my grandmother's property.
I have tried a couple of Philippine mangos here and they did not survive our winters. Our winter here is not severe, but still cold enough to kill most tropicals if not protected.
I have one young Philippine/Java guava tree that loses its leaves in winter but is otherwise ok. I planted 3 of the same variety and only one made it through the first winter.
I am thinking that if I keep the duhat tree in a large pot and move it into the greenhouse during winter, I can plant it in the ground once it has matured enough to survive the winter.
But who knows

Planting tropical trees in southern California is always a gamble. Sometimes you get lucky and end up with that .01% seedling that thrives in your local climate.
My wish list of Philippine trees for my property:
thanks but the trees mentioned below are introduced species except for Balimbing and Duhat
1. Philippine mango (India)
2. Atis (tropical america)
3. Balimbing (almost throughout asia including my country)
4. Guyabano (tropical america)
5. Duhat (Philippines, India etc)