Hey there! So you're trying to integrate a PLDT Fibr router into an Omada setup for Pisowifi. That's a pretty ambitious project for a newbie!
From what you're describing, the main issue might be that the Omada controller is specifically designed to manage Ubiquiti's own line of Omada-compatible hardware (like their access points, switches, and routers). It probably won't automatically detect or manage a standard consumer router, even if you've configured it as an extender or AP.
If you want to use the Pisowifi functionality, you'd typically set that up directly on the device that's acting as your main gateway or access point, not necessarily through the Omada controller itself unless you're using an Omada AP for the Pisowifi SSID. Hope that clears things up a bit!