I want the data coming from the database to be sorted as subheadings, first the Thickness will be given and the Genres belonging to that thickness will be displayed. When I click, it will open under it, and then I want the colors of the type we pressed to appear.

I want the data coming from the database to be sorted as subheadings, first the Thickness will be given and the Genres belonging to that thickness will be displayed. When I click, it will open under it, and then I want the colors of the type we pressed to appear, but I couldn’t do it 🙁