Hi,
In order to create HW variant, you can follow these steps:
1. On the right panel of EB display, choose Sidebar tab, then double click to "Edit Selectable PostbuildVariants"

2. Click to Add icon to create a new Post Build Variant. For your demand, at least 2 Post Build Variant should be created.

Choose Variant Criterions tab. Add a criterion, then add new criterion textual representation in the right

Back to Predefined Variants tab. Choose corresponding variant criterion for each Post Build variant point.

3. Close Edit Selectable PostBuildVariants tab, and save your settings. Open EcuC module. Enable the EcuCPostBuildVariant, then choose selected Post Build Variant Ref (default variant)

4. In EcucPostbuildVariantRef tab, add your recent created Post Build Variants.

5. You will see variant option available in your top of EB display. Choose each variant to configure. Each node marked with "V" letter can be configured as variant option. Right click to the node, then choose "Edit Variant condition". Add corresponding criterion. You only need to add criterion one time, the other criterion for other variant of this node will be filled automatically.

After that, you can choose different value for that node in each variant.