They just aren't.

Its a very different thing from a LE perspective and the pressures on DNMs are vastly greater than on those DEXs.

Which is exactly why DNMs use a solution that provides good privacy out of the box (#monero) and not LN.

They also sometime still accept on-chain BTC. Either because they're stupid or because they KNOW the risks involved and flip it into monero anyway.

Either way, from their perspective it better than using something with unknown (and perhaps unknowable) privacy assurances.

it's cool that we have DEXs with LN integration but lets be real,

Bisq hasn't even been accepting LN for 6 mos yet,

and honestly how much total daily liquidity are we talking about and does anyone really care yet?

not equivalent threat models, therefore not DNMs.