Yes, there is. It is the property "Inheritance layer"
Name the layer that shows your inventory and in another layout just create a layer and enter that name in the text field of the property.
Layer named "MyInventory"
Layer named "Whatever"
Inheritance Layer Property of Layer "Whatever" set to "MyInventory"
There are issues with positioning, so this works best if both layouts have the same dimension, or if the layer you want to inherit is set to not zoom or scroll (both 0%)