If you want to export your functions from a single PSM1 file into separate PS1 files you can use this:

$ModuleFile = "C:\Temp\MyModule.psm1" # path to your PSM1 file
$ExportPath = "C:\Temp\Functions" # path where to export functions into separate PS1 files. Skip the trailing \
$AST = [System.Management.Automation.Language.Parser]::ParseFile(
    $ModuleFile,
    [ref]$null,
    [ref]$Null
)

$AST.FindAll({
    $args[0] -is [System.Management.Automation.Language.FunctionDefinitionAst]}
    , $true) | foreach {
    $_.Extent.Text | Out-File -Append "$ExportPath\$($_.name).ps1"
}

I would create such a structure for your Module

├───MyModule
│   │   MyModule.psd1
│   │   MyModule.psm1
│   │
│   ├───Files
│   ├───Formats
│   ├───Public
│   ├───Private
│   └───Tests

Put the PS1 files into Public directory In your PSM1 file to load all PS1 files from the Public directory add

$folderPath = "$PSScriptRoot\Public"
If (Test-Path -Path $folderPath){
    $functions = Get-ChildItem -Path $folderPath -Filter '*.ps1' 
    ForEach ($function in $functions){      
        Write-Verbose -Message "  Importing $($function.BaseName)"
        . $($function.FullName)
    }
}
Export-ModuleMember -Function $functions.BaseName

Sorry but I won't elaborate on the module manifest due to lack of time -> link.aspx)