PowerShell search for files from CSV and output dir if found - powershell

Question

I've been trying to piece together a PowerShell script from what I've read on here to search a CSV list of filenames in a directory and subdirectories and then if found output the directory path with the filename out into a CSV, or if it is not found just the filename with not found next to it.
Below is what I've done so far, it works to an extent however it is not 'finding' the files, it just reports them all not found even though the files are there to be found in my test folder.
Import-Csv -Path files.csv | ForEach-Object {
Get-ChildItem -File -Recurse $_.filename
if ($_.filename -eq $_.Name) {
$_.path = $_.FullName
} else {
$_.path = "NOT FOUND"
}
$_
} | Select-Object filename,path | Export-Csv -Path output.csv -NoTypeInformation

Answer 1

What if the file is found in more than one folder?
storing the found folder(s), creating a [PSCustomObject] and assigning output to variable $Result
Incorporating Lee_Daileys helpful hint
## Q:\Test\2019\01\02\SO_54001484.ps1
$Result = ForEach ($file in (Import-Csv -Path files.csv)){
$FoundInFolders = (Get-ChildItem $file.filename -File -Recurse ).FullName
if ($FoundInFolders.Count -eq 0) {
$FoundInFolders = "NOT FOUND"
}
[PSCustomObject]#{
filename = $file.filename
path = $FoundInFolders -join ', '
}
}
$Result #| Export-Csv -Path output.csv -NoTypeInformation
Sample output:
> Q:\Test\2019\01\02\SO_54001484.ps1
filename path
-------- ----
test.cmd NOT FOUND
test.csv Q:\Test\2018\03\20\1\test.csv, Q:\Test\2018\03\20\2\test.csv, Q:\Test\2018\03\20\3\test.csv
test.ps1 Q:\Test\2018\03\31\test.ps1
blabla NOT FOUND