I utilized an atomic swap service that facilitates the transition from Liquid to Lightning. However, the funds do not directly reach my wallet. Instead, they are routed through Phoenix's services, who then creates the necessary funding transaction and channels. Thus, I suspect, it is that Phoenix has the capability to expedite the transaction.

Upon further exploration, I believe that splicing will trigger the creation of a new funding transaction, which might cause either a new channel to be created or a new funding transaction for the current channel.