Just an attempt to get info about classes defined by a given module.

Get-ModuleDefinedClass.ps1

[CmdletBinding()]
[OutputType([hashtable])]
param (
    [string]$Path,
    [string]$ClassName = '*'
)

$moduleBase = Split-Path -Path $Path -Parent

Write-Verbose "Module name - $fileName"
$scriptBody = @'
using module {0}
'@ -f $Path

$out = [ordered]@{}

$script = [scriptblock]::Create($scriptBody)
. $script

$assembly = Get-Module | 
    Where-Object { $_.ModuleBase -eq $moduleBase } | 
    ForEach-Object ImplementingAssembly |
    ForEach-Object GetTypes |
    Where-Object {
        $_.IsPublic -and
        $_.Name -like $ClassName
    } |
    Sort-Object Name |
    ForEach-Object {
        $out.Add(
            $_.Name,
            $_::new()
        )
    }

$out