Your eSIM connects to CTM and 3 in Macau. CTM is the main local carrier and has the widest reach in the territory. It covers almost all of the populated area, so you get a strong signal in the Macau Peninsula, around the casinos on the Cotai Strip, and out on the islands of Taipa and Coloane.
Because the eSIM rides on these local networks, your phone picks the strongest signal on its own. You do not set anything manually. Speeds are fast across Macau, with 4G almost everywhere and 5G in the busy districts.