Multi-page app that shares dropdown results

I have a multi-page app that has a dropdown where I would like all pages to be updated based on a selection in the dropdown. Right now it seems like each page needs the same dropdown over and over.

Is there a way to achieve this?

I have something similar where I share information between multiple apps using session variable. I use the session variable from flask-security along side dash where the user log in and then any changes he made is stored temporarily within his session data. Hope that this helps!