In Robosats you can create a P2P swap for Lightning BTC to on-chain BTC and viceversa. Easy way to buy Lightning Bitcoin without KYC and then do an on-chain swap https://learn.robosats.com/docs/swaps/ It's possible to do this with stowaway (enhanced privacy using collaborative multi wallet transaction that masks the amount you are sending)
https://youtu.be/RkaCv2HcIaI (Tutorial in Spanish)