The lsp with the blinded path knows the amount that is sent to you, but does not know where it comes from and does not know if it is the last hop, maybe I have expressed myself wrong.

The sender will never know where the money goes with the blinded path, but with the wrapped invoices the sender will know that it goes to the Zeus LSP but not the final node, but the LSP will know that the money is for you.

If you don't use any of this the sender knows which node the payment goes to.