So is ⚡ (more so time chain related though) People forget litecoin implemented lightning first

uhh no. lol lightning uses Bitcoin primitives to allow quicker transactions of any size without having to go on-chain to settle. ecash is a completely separate token that _can be but is not required to be_ backed by Bitcoin.

Not arguing with that, but why can lightning exist on other chains then? I fully understand ecash is just an accounting system hence its totally separate

the concept of having presigned transactions and continually updating them is not specific to Bitcoin. other chains could do that too. that doesn't change the fact that it's not another token being traded back and forth. it's still just Bitcoin. that is not the case with ecash.