It’s plumeria, but I don’t know the specific one. So beautiful.

Plumeria, they come in a rainbow of colors.

Looks like Plumeria rubra ’Aztec Gold’

Tried growing this when I lived in Sydney, Aus.

Failed every time, due to black ants, hollowing out the trunks.

My favorite right after desert roses... yours is a beauty! In Hawaii they make their lai's with those flowers, very fragrant and the flowers will float in a shallow dish of water for a bit.