Well, found the answer.
I've created the manifest using New-ModuleManifest without any special parameters other than module info, and added the cmdlets on CmdletsToExport.
That was wrong.
Created the manifest using the instructions on this doc:
$manifestSplat = @{
Path = ".\$module\$module.psd1"
Author = 'Kevin Marquette'
NestedModules = @('bin\MyModule.dll')
RootModule = "$module.psm1"
FunctionsToExport = @('Resolve-MyCmdlet')
}
New-ModuleManifest @manifestSplat
Hope it helps someone out there.
Thanks!