Liquid obscures the amounts, but not the addresses. Thus, it is possible to deduce a probabilty of address correlations in transactions.

A cool site for peg-in and peg-out is Sideswap. Perhaps one way to anonymous coins is to use tor and pegin with your btc to lbtc, then pegout with them later on a new tor connection. Perhaps combine with Boltz exchange, as they support bitcoin, lightning, and liquid. Could use tor with them as well.

Though, I think the very best would be a coinjoin on Liquid. No amounts visible and thus impossible to correlate addresses with certainty. I don't know if anyone has implemented that though.