#asknostr #introductions #question

Hello, I'm still a beginner to bitcoin and nostr and lighting so I have some questions.

Say we have bob.

Bob uses nostr.

He posts on nostr.

People zap him at his lightning address (for example, bob@getalby.com)

Now, he has 100 sats.

I was looking it up on google and I heard that lightning network transactions are private and encrypted.

Does that mean that only Bob and the sender know the details of the zap?

To the rest of the people on the network - is it just an encrypted transaction? And no further information could be deducted from it? Like say for example we have Mike on the lightning network. He sees a transaction, but doesn't know who it's from, who it's going to, and how much it is? I'm a little confused.

Thank you in advance #nostr community!