What are the specific INC foundation beliefs regarding the "End of the World" and the Seven Bowls?

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I’m curious about the specific biblical foundations of the Iglesia ni Cristo (INC) regarding their "the end is near" doctrine. We always hear the "Umanib ka para maligtas" (Join to be saved) pitch, but I haven’t heard much detail on their specific interpretation of the apocalypse signs.

They clearly feel the world is in its "last gasp," but what are the actual markers they use? Do they specifically preach about the Seven Bowls of Wrath (Pitong Mangkok na Salot) from Revelation?

From what I’ve gathered, here are the primary verses and signs usually associated with the "End Times" in this context.

My questions for the sub:

1. Does the INC administration actually teach the Pitong Mangkok in detail during worship services, or is the focus mostly on the 1914 timeline?

2. Is there a specific "checklist" of signs they believe are still yet to happen before the literal end?

3. Why does it feel like the "Join us" message is louder than the actual "Prophecy" message lately?