no, it's a peer to peer network thing
lightning is based on Sphinx https://cypherpunks.ca/~iang/pubs/Sphinx_Oakland09.pdf
it uses a source-routed onion encryption layering scheme
https://github.com/indra-labs/indra was my attempt to turn that into a whole network transport protocol, i did that work from late 2022 to 2023
one of the things that i figured out during that research and development work i was doing was that in order to make this into a network transport, it needed a very fast converging, but decentralised mechanism for propagating network state... congestion is the biggest risk, nodes being offline is the obvious but congestion is the real danger, and this is exactly the same dynamic with Lightning