When downloading the Secret Management module as a nuget package, the folder structure is incorrect and requires adjustment. After correction, module is ready for install:
Incorrect folder structure :
C:\Users\ username \Documents\PowerShell\Modules\Microsoft.PowerShell.SecretManagement.1.1.2\Microsoft.PowerShell.SecretManagement.psd1
Correct folder structure :
C:\Users\ username \Documents\PowerShell\Modules\Microsoft.PowerShell.SecretManagement\1.1.2\Microsoft.PowerShell.SecretManagement.psd1
Still troubleshooting why the module is not available during dashboard runtime. Tracking that issue here: Secret Module Cmdlets Not Found