Meh... If you then "pull out"/withdraw the BTC from the other LN wallet no one knows that you were the sender, yeah. But there is still the connection between the adresses.
You can argue that you received those sats via lightning but it is not as private as a Coinjoin...
@XBT I actually don't know. Muun doesn't use your original funding utxo to give you a channel and I couldn't find any good source on how it actually works.
Bitcoin Maston Instance