if 'payments' use p2wpkh but are denominated in 'picobitcoin-1' (millisats) which bitcoins blockchain rules dont understand and wont get confirmed by the bitcoin network or accepted by bitcoin full node peers.. then its not bitcoin.
Literally no one has ever claimed that Lightning transactions will be confirmed on the main chain. This appears to be some weird metric that you have come up with solely to justify your point of view.
Almost all services today require at least three confirmations before a transaction can be concluded
Large centralized services require 3 confirmations maybe, since they are handling large deposits, but most merchants I use in person are more than happy with a single confirmation, or indeed none at all.