Tree view menu inside an according control

Dear Friends,

iam creating an app using Ionicv4 with Angular. i need to create a treeview menu inside an accordin control. Iam new to ionic4, Please guide me to do this. All the text and details of menu iam laoding from json.

for example i need to do the same like output of below link:

Thanks and Regards,
Syed Abdul Rahim