On paper, there should be a good open data ecosystem in the Philippines:
But if you ask most people about their experiences working with open data in the Philippines, they will tell you that it's difficult or there is none. The country has no open data law and its Freedom of Information (FOI) mandate comes in the form of an Executive Order (EO No. 2, series of 2016). Furthermore, it is not uncommon to see people and institutions hide behind the Data Privacy Law in order to avoid releasing documents, data, and information. It is not a stretch to say that there is a big disconnect between the state of open data on paper and actual state of open data in the Philippines.
Freedom of Information (FOI) and Open Data have similar goals but they are not the same thing (especially with how FOI is constructed right now in the country).
Be that as it may, it is important to understand that open data and FOI are not adversaries nor are they meant to replace one another. Rather they are complementary tools towards the same goal of building more transparent, trustworthy, and accountable institutions. There are instances where FOI is the better approach than open data and vice versa.
There are countless sources of Philippine data—open or otherwise. I curate a repository known as Awesome Data Philippines where I list down data sources for the Philippines that I've used or encountered such as Open Data Philippines and the Philippine Geoportal.
I also have some videos on how to access data from these data sources.