Seems like you need to find just a casino where you can bet with BTC! There are various options on the market, so find the most suitable for you!
Though I am not too good with Lighting network but I understand lighting network and the topic and the content of this thread. The Op is trying to know if there is any casino that uses Lightening Network. And I know that people who are using the network is not much so in that case the casinos that are using the network is not much as well but they are and some commentors have dropped links for those casinos.
I know some casinos wanted to add Lightning Network but it was so complicated and full of bugs in the process so they had to give up and instead added Litecoin and Doge.
I prefer Bitcoin, but I dont like Lightning Network and I use altcoins for lower fees.
Lightning does not have private transactions.
Bitgoba is a senior programmer with many years of experience, and rest assured, he understands the technical aspects of Bitcoin, shitcoins, and the Lightning Network better than most people on this forum. Additionally, in recent years, I have read several excellent economic books such as "The Bitcoin Standard," "The Fiat Standard," "Broken Money," etc., which have enabled me to understand Bitcoin from an economic perspective. I've gone down this rabbit hole, and now I understand what Bitcoin is and what a shitcoin is, but unfortunately, many still don't grasp this concept.