That's a long stretch from "why aren't we seeing more adoption" to your assertion that "no wallets/exchanges/no one uses it"?

Because payments happen been pairs, there's no easy count of activity. The best estimates I know of are things like https://blog.river.com/the-lightning-network-in-2023/ which is almost 12 months old.

As to "no wallets support it", that's a strange thing to say, since lightning wallets support it, obviously.

I'm yet to see any comparable statistics in L2s on Ethereum? Was hoping you'd have something there, too :(