You can actually use Robosats for swapping between LN and Monero! Make an offer if you don't see one :)

Outside of that, I generally recommend Cake Wallet (cakewallet.com) or Trocador (trocador.app) to use good instant exchangers.

There is also growing volume on Haveno (https://haveno-reto.com/) and growing usage of atomic swaps (https://unstoppableswap.net/) for more censorship-resistant and decentralized options.