QGIS How to change display name of layer in legend using layer metadata?

Question

In the Layout Manager, I want to change for a selection of layers the name displayed in legend without changing the layer names.

I am using QGIS 3.16

I am getting the legend entry names from the layer metadata (in my case the 'Title' data)

This is what I have tested so far:

I went to the legend Items Menu

Edit icon

and I am trying to build an expression to display the title metadata

Expressions tested:

attribute('title')
-->Preview  No feature was found on this layer to evaluate the expression.

display_expression(@layer,'title')
--> Preview: Expression invalid

...

Answer 1

This one seems to work:

layer_property( @layer,'title')