I practiced the same but I have an issue in Mark complete button. If I enter the Mark complete button in the backend my whole status table for other issues also changes to closed. Please help me to fix it.
According to my understanding, I have tried to create a similar scenario. I created two tables, Customer and Workorder.
The customer table contains the names of customers
A Workorder table consists of all tasks related to customers (Note: customer column is a rowlink & picklist format that pulls data from Customer table). Workorder table may have multiple tasks for a single customer.
I have added two components to the screen:
A picklist that sources data from the Customer table.
Column list based on the Workorder table filtering the items belonging to selected customer in picklist using below expression.