This script closely resembles winget upgrade --all --include-unknown, with the added functionality of being able to skip specific applications.

WingetUpgrade.ps1

class Software {
    [string]$Name
    [string]$Id
    [string]$Version
    [string]$AvailableVersion
}

$upgradeResult = winget update --include-unknown | Out-String

$lines = $upgradeResult.Split([Environment]::NewLine)

# Find the line that starts with Name, it contains the header
$fl = 0
while (-not $lines[$fl].StartsWith("Name")) {
    $fl++
}

# Line $fl has the header, we can find char where we find ID and Version
$idStart = $lines[$fl].IndexOf("Id")
$versionStart = $lines[$fl].IndexOf("Version")
$availableStart = $lines[$fl].IndexOf("Available")
$sourceStart = $lines[$fl].IndexOf("Source")

# Now cycle in real package and split accordingly
$upgradeList = @()
for ($i = $fl + 1; $i -lt $lines.Length; $i++) {
    $line = $lines[$i]
    if ($line.Length -gt ($availableStart + 1) -and -not $line.StartsWith('-')) {
        $name = $line.Substring(0, $idStart).TrimEnd()
        $id = $line.Substring($idStart, $versionStart - $idStart).TrimEnd()
        $version = $line.Substring($versionStart, $availableStart - $versionStart).TrimEnd()
        $available = $line.Substring($availableStart, $sourceStart - $availableStart).TrimEnd()
        $software = [Software]::new()
        $software.Name = $name
        $software.Id = $id
        $software.Version = $version
        $software.AvailableVersion = $available

        $upgradeList += $software
    }
}

$upgradeList | Format-Table

$toSkip = @(
    'LeNgocKhoa.Laragon'
)

foreach ($package in $upgradeList) {
    if (-not ($toSkip -contains $package.Id)) {
        Write-Host "Going to upgrade package $($package.id)"
        & winget upgrade $package.id
    } else {    
        Write-Host "Skipped upgrade to package $($package.id)"
    }
}