Point Bi-Serial Lag Correlation

Hey stats friends,

I want to detect continuous changes in the environment based on events. I imagine these events should be coded dichotomously by date. I have come across two useful tools, lag correlation (using astsa package in R) and Point Bi-serial Correlation. Is there such thing as a point bi-serial lag correlation? I cannot find anything. The idea here is I want to detect lag correlations between dichotomous and continuous vars.