Cannot perform Variable Binding

I have 2 testcases:

1. TC_Login - configure to make use of variable and bind to testdata
2. TC_Create Customer - configure to make use of variable and bind to testdata

I have one excel which contained testdata for both login and create customer in a single table as shown below:
I will add more data in the excel later

Then, i created another testcase Demo whereby i call both testcases, then create a test suite and Binding Variable is not possible.

How can we solved this?

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Ziyaad,

Here is the instruction on how to use data-driven approach I found in the katalon site https://docs.katalon.com/katalon-studio/videos/apply_data_driven_katalon_studio.html