On click of text , i want the list view builder to show that container of that specific text

Question

I am implementing scrollcontroller flutter according to A , B , C text . and using a listview builder on same page to show all data of that A. For example clicking on A , screen will scroll automatically and will be shown container having names starting with A eg Angel , ANger etc.

if i click on B then it should scroll to container containing Basket , Boal etc.

how to implement this functionality! using scrollcontroller or should i use hash map

My ui looks like :-

1. I have a list of alphabets A to Z.
2. Below that i have list of containers in a way that container A contains names starting with A , B contains names starting with B.
3. I want on click of list of alphabet's alphabet , my screen should scroll down to that specific container containing alphabets !