I think for chain swaps on utxo level, yes. Boltz does have the utxo links across btc/lbtc. Tor is not really relevant here, that just obscures your ip network connection. If the original utxo has some kyc linked to it, boltz (not the public) can link this to your final swapped btc utxo.

However an LN->LBTC->BTC swap does hide the input utxo… even for Boltz