If you are wondering if it is possible to have two separate targets for standalone mode, the answer is "Yes".
You can have two targets that are standalone in different orientations but they would need to be unique for the image used.
To trigger a specific target to be used for AR placement, you need to be able to see the target physically in the real world. If you don't have one then the software will use the target that is set as the "Default target" for placing content.
Read more: WorkLink Work Instructions: Visibility Mode.