I don't remember seeing an escrow for Lighting. It's possible that it's because it's mostly about small amounts, so the potential profit through the escrow fee is negligible.
As an escrow, you are obliged to judge whether the trade is really finished as agreed, sometimes it's not the simplest thing. All this requires a spend of time, and I'm not sure if a couple of satoshis covers it.
You have an example of a very promising platform, Bridgoro, the final version of which is expected to be released soon. If I'm not mistaken, I think there was a discussion about including Lighting on the platform.
Bridgoro.com - Instant Crypto Exchange | #kycfreeCertainly, this is perhaps the direction you should go for what you're thinking about.