I think there are over 24 exchanges that offer LN but very few are as large as Kraken I think only Bitfinex would be clos

Yup, that's about the current state:

Exchanges with support for bitcoin Lightning network ⚡ payments
https://cointastical.github.io/Exchanges-With-LN
https://cointastical.medium.com/exchanges-with-support-for-bitcoin-lightning-network-payments-739829bcb7bc