That to me looks like Reticulums [1] adressing ("Destinations") with transport done via QUIC. Does it add anything what Reticulum didn't already solve, other than using slightly different protocols - do they have an advantage?

[1] https://reticulum.network/

Or I2P that even comes with reinforced privacy: https://i2p.net/en/

This is the comment I was about to make. Reticulum is already a very complete network stack.