Boltz.Exchange https://boltz.exchange/

or Wallet of Satoshi (0.5% fee when you deposit on-chain, but then you can withdraw via LN with typical LN fees)

There are other methods ... look for ones with the Lightning emoji:

KYC-Free-Instant-Exchanges https://github.com/cointastical/KYC-Free-Instant-Exchanges

mine it, then run a lightning node. there is really no other way at scale

Download Blixt, and receive an onchain payment. It will then automatically open a channel with those funds.

Happy spending ⚡