I suggest you go directly to Macau on your first day, otherwise, according to the time of your round-trip ticket, you will be in a hurry to go to the island.
Day 1: Macau
Day 2: Island, you can choose Lingding Island or Dong 'ao Island, and you can go back and forth on the same day. Go to Wan Chai to eat seafood in the evening. If you don't want to run that far, please refer to the public comments. I have been to a deep-sea fish stall in Wan Chai myself.
the third day: I went to have morning tea early in the morning. The better morning teas in Zhuhai are Jin Yuexuan, Yijian and Xinhaili. After dinner, go to Yuanming New Garden in Zhuhai and Yuanmingyuan, and then go to the fisherman's girl in Zhuhai, seaside park and Yelidao on Lovers Road. Wonton Noodles, a "seven uncles" not far from Yelidao, is not bad, and rice rolls recommended Xiguan cuisine behind Jusco Supermarket. These two houses are not far from Yelidao, so mobile navigation can find them. Have a nice trip.