Firebase and complex structure to retrieve data

Good morning,

I read this article

But I’m having trouble applying it to my firebase database.
I would like to retrieve all the products that will be saved in: project bucket /“OTHER” or /“MISSION”…

  • sub-project: “EPI”, “ANALYSIS”,… (see my firebase structure) where inside I have products: tyveck, mask,…
    It would just take a little help me to retrieve the data and display them in a list.
    You will also find some bouldering that I tried to do.

My firebase structure :

My block :


Instead of calling with bucket, just call the whole data then use dictionary mode to parse into separate list , or call is as in json format


I do not think it is a good practice, in my opinion what is needed is consumed.