I have seen this Pi network thing been shilled a lot, and yes, even I downloaded it at some point but when I discovered it was like a huge ponzi with earnings from referrals and no block explorer (that I could find),,, I did not.
I think the founders really milking their education (stanford).
there's no block explorer because the blockchain is still in development. They only just got the quorums working on the testnet.
We don't know what is happening with the Pi network, because in many cases I have there are many positive reviews about this project and at the same time there are many negative reviews about the project. Recently they made an announcement about their progress and developments.