Power Automate : How to use variable in items() function

Question

I would like to put the name of the list column in a variable and use it in the items() function but didn't get the correct content.

Who can help me ?

What I dit :

• Set variable "Column_Name" (string) to "T_x002d_CCE_x002d_E" - This is the correct name from the column
• Get items from a list
• Apply to each with 'Value' as input
• Set variable "Column_Value" (bolean, same type as column T_x002d_CCE_x002d_E) to items('Apply to each')?['T_x002d_CCE_x002d_E'] and I get the correct value in Column_Value

But if I replace the last action by

• Set variable "Column_Value" (bolean, same type as column T_x002d_CCE_x002d_E) to items('Apply to each')?[variables('Column_Name')] and I don't get the correct value

  Picture of compose of variable Picture of compose with hardcoded column name T_x.... Picture of compose with items() using variable and output is empty