lightning network is not a bitcoin feature.
its a separate work for ANY COIN to use
people can link any altcoins chainhash to lightning and do offchain transactions with others who are also wanting to play with that coin.

its only currently talked about in regards to bitcoin because just mentioning bitcoin and something else in the same sentance gives that something else instant fame.
remember bitcoin had to change to be LN compatible. not LN was designed to be bitcoin compatible... that alone along with the chainhash required code shows LN is its own network.
and lastly LN is not a blockchain. LN is not peer to peer. LN is not a push network LN needs the users to be online to accept/route payment(you cant just send funds to anyone anytime)

LN is simply a separate service network that could be used for convenience by any coin. and is not a feature that bitcoin requires. so dont over promote LN as a needed solution for bitcoin because that just warps peoples minds into thinking that bitcoin just doesnt work/is broke and needs these separate networks. by saying bitcoin is broke and needs a separate network is foolish. and thats why many people want BITCOIN evolution and not other network evolution and takeovers