Ours reaches both of the country's major networks, Globe and Smart, on 5G. Your phone picks whichever is stronger where you are and switches without you doing anything.
That matters here more than in most countries. The Philippines is seven thousand islands, and Globe and Smart have not built out identically. On one island Globe will be the one that works, on the next it will be Smart, and locals routinely carry both.
A plan that reaches only one of them is a plan that is excellent half the time. Most travel eSIMs sold for the Philippines carry a single network, and the ones sold through booking sites are usually Smart only.