When going through interactive 2D animation, the suitcase icon will indicate if something is in your inventory. VR does not have an equivalent leaving it to supporting text/sound. A (visual) indicator that something is in your inventory could help make it clearer to the user that they can open the inventory.
Examples of implementation:
Using an icon on the (opposite) wrist menu or hand.
When going through interactive 2D animation, the suitcase icon will indicate if something is in your inventory. VR does not have an equivalent leaving it to supporting text/sound. A (visual) indicator that something is in your inventory could help make it clearer to the user that they can open the inventory.
Examples of implementation: