Azure devops: user defined variables between release pipeline stages

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PowerShell

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I have a simple test release pipeline with 2 stages with 1 powershell task in each stage.

reference: Define variables - Azure Pipelines | Microsoft Docs[^]

1st stage: I want to set a variable value, from what I understand I have to use this weird syntax.
I also set the Output Variable Reference name to : MyReferenceName

PowerShell :

$myVariable='potato'
Write-Host 'myVariable:'+ $myVariable
Write-Host "##vso[task.setvariable variable=MyOutputVariable;isOutput=true]$myVariable"

2nd stage: I want to use/consume that variable

PowerShell :

Write-Host 'reference:'+$(MyReferenceName.MyOutputVariable)

In the second stage, I cannot seems to resolve the variable.

Is this the way it should be done ?

What I have tried:

I've tried different type of variable name permutations.