Access dcc.Storage or hidden Div data from Flask route (or without using a callback)

Is there any way to access the storage / hidden div data from a function that is not a callback?

I’m storing in the Storage component (previously in a hidden div) a boolean pandas series that changes all the time depending on the user filter selection. This will constantly filter the data shown in charts. I want to let the user download the data shown in the screen (then it should consider the filters as well). How can I pass the boolean series filter to the Flask route, WITHOUT using a callback? (because as far as I know I can’t introduce the flask route in a callback)
Thank you

@dadv92 I am looking for the same thing. Did you find any solution?