Breaking of the glass, in interfaith ceremonies performed.

In a Jewish wedding, the tradition of breaking a glass symbolizes the destruction of the Jewish Temples in Jerusalem, serving as a reminder of tragedy even amidst great joy, and is often interpreted as a representation of the permanence of marriage, as a broken glass cannot be put back together; the groom usually breaks the glass with his foot at the end of the ceremony under the “chuppah” (wedding canopy), and the guests shout “Mazel Tov!” (Congratulations!) upon hearing the glass break. Source: AI Overview

While working as a wedding officiant, there have been occasions where I have performed blended ceremonies where one person was of a Jewish tradition, and the other was of a Catholic tradition.  Ceremony words and rituals from both traditions can be incorporated into the script.  

For example, a Catholic reading/words can accompany the the coin/arras and lasso rituals, while words and symbolism explanation can accompany the Jewish tradition of breaking of the glass.  This breaking of the glass usually happens towards the end of the wedding ceremony.