If you or someone in your team adds equipment without connecting it to an employee or a space, that hardware will lie as a unit without an owner. You can always choose to connect this equipment to an employee or a room afterwards. To search for the equipment, go to Asset Management -> Equipment in Velory. Then click on "Filter" which is located on the right-hand corner, followed by you clicking in the box that you only want to show equipment without owners.
To assign one of the devices that do not yet have an owner, tap the three dots you see in the right-hand column and select "Edit". You will then get a view where you can assign the device to a specific person or space.