KYC is attached to you .. you can only remove the link between yourself and the UTXOs you have, boltz can help, but you are KYC'd regardless ..
Discussion
But if you buy directly on Lightning, do you have UTXO's? If you stack several times on Lightning & once every so often, you create 1 Liquid transaction with all those little stacks. And if you repeat that till you have a fat L-BTC amount, you then consolidate that fat L-BTC amount into one BTC UTXO, is there any KYC info? Sorry if this is a bit out of whack, but I was already stacking this way, till I saw the exact same movie from Blockstream/Liquid Network.
KYC is attached to *you* .. you can break the traceability of your stack, but you can't be unKYC'd ..