Is it possible to iterate through the lines using an EL expression?

Summary:

I want to set a condition for the visibility of the confirm button based on the selected subinventory. This works correctly when there is only a single line selected, or when all selected lines belong to the same subinventory. However, it doesn't work when multiple lines are selected and they belong to different subinventories. So, I'm thinking is there's a way to iterate through the selected rows and check the subinventory value of each

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