If no ID collection is performed, then the transaction is KYC-free.
Take care if you sell to a peer from your KYC stack. You could be accumulating a bitcoin denominated tax liability depending on your jurisdiction.
Discussion
If you are relying on KYC'd custodial Lightning then your zaps are less free.
What’s the best wallet for lightning?
I'm not a Lightning expert. Everything will have trade offs.
Wallet of Satoshi
Pos: Best UI/UX and as of yet no KYC
Neg: custodial (no privacy from custodians) and pulled from US App Stores
Phoenix
Pos: Pretty good UI/UX, no KYC, self-custody, can use own Electrum server, can use Tor, Splicing
Neg: expensive (min 0.4%), pulled from US App Stores, limited privacy from LSP
Zeus with Olympus
Pos: good ui/ux, no KYC, self-custody
Neg: limited privacy from LSP
Zeus with Own Node
Pos: absolute sovereignty
Neg: managing your own lightning node and channels
I have a feeling the words “Pulled from US App Stores” could become a common theme for self-sovereign Bitcoiners. We need decentralized mobile devices with decentralized App Store!