OKX, previously known as OKEx, underwent a rebranding from its predecessor OKCoin. However, it no longer offers support for the Lightning Network. A recent check on their website confirms the absence of Lightning Network withdrawal options, limiting transactions solely to on-chain methods.
They do not allow use of the exchange if you're based in the USA. Rumor has it that a VPN from New Zealand will get you in.
I cannot comment on the availability of LN on the exchange since I do not have an account on there.
OKX, previously known as OKEx, underwent a rebranding from its predecessor OKCoin. However, it no longer offers support for the Lightning Network. A recent check on their website confirms the absence of Lightning Network withdrawal options, limiting transactions solely to on-chain methods.