When we do get_all or get_list , how can I get values of associated child table with each item in the list.
Seems to be such basic feature missing, there’s tons of features in Frappe but it can’t handle simple thing which is must in ORM. IMHO this makes it useless for any serious product development.
You can use join, there is a query build that provided you to do what you want.
maybe you need this:
https://frappeframework.com/docs/v13/user/en/api/query-builder#joins-and-sub-queries