Just a little PowerShell Do-Until loop I used for searching an active log file.

Do-SearchStringUntil.ps1

do {
    
    # set variables for searching Service.log
    $now = Get-Date -Format 'yyyy-MM-dd'
    $log = 'C:\Users\wkindle\Desktop\Service_Test.log'
    $logstr = 'updating status to READY'

    Write-Output "Searching for READY status"

    # using this to create a timeout counter
    $integer++
    
    #Wait 5 seconds
    Start-Sleep -seconds 5

    # Take the last 15 log entries from today and store as a variable
    # I choose 15 becuase I don't know how fast the log is written or how quickly READY status is returend
    $StatusMessage1 = (Select-String -Path $log -Pattern $now | Select-Object -Last 15)

    $StatusMessage2 = (Select-String -InputObject $StatusMessage1 -Pattern $logstr | Select-Object -Last 1)

} until ($StatusMessage2 -ne $null -or $integer -eq 120) # Timeout the script after running 10 minutes | 5*120 = 600/60 = 10mins

Write-Output "READY STATUS FOUND"