Norms at R1 institutions for gifts for chair/cmte members after exiting program?

r/

I saw a post elsewhere asking something similar, and really have no idea. I’m a first-gen college student set to defend my dissertation soon at an R1. My chair and another committee member have gone above and beyond their roles throughout my studies, especially during the tumultuous Covid era.

Is it the norm for to give small gifts to chairs/committee members as a token of thanks or should that be left for the acknowledgement section of the dissertation? Anyone with experience/insight into this? I’m guessing it’s not the expected or typical, but I don’t want to make a faux pas.