Okay so to start if your goal is to find a file for the current user then you need to first discover current logged on user OR loop through all existing user profiles on the machine and search the appdata directory for the file OR set your script as a logon script.

Not sure how you're doing this but If you don't do this then you'll always be searching your own appdata folder.

"C:\\Users$currentuser\\AppData\\Roaming\\Microsoft\\Windows\\Recent\\testjackimage.jpg"

You don't need to make $env:username a variable - its already a variable.

You're missing a slash  - C:\\Users\\$Env:username\\etc...

for your output table try using pscustomobject.

    #you can fill in the properties with your code i'm just showing how to set it up
    $results = [pscustomobject]@{ Date = get-datestuff; Computer = $env:computername; Found = true/false }
    
    write-output $results
    
    $results | add-content "C:\TESTPS\LuckyEscape.csv"

"I'm trying to see if an image has been opened on someone's m

trying to find a file by logged on user