I think theres a misunderstanding, their service permit to buy sats with fiat directly in your phoenix wallet (or other lightning announced/anannounced channels, I tried also with zeus) without kyc (kyclite cause the fiat payment method).

My doubt is that the invoice that they use could request the non-aliased nodeid to phoenix and that theres a way for pocket to obtain infos aboit the UTXO behind the channel.