Why am I not getting any output when using Get-DbaInstalledPatch via a Powershell script to gather SQL Server patch levels?

Question

Using DBA Tools to gather a variety of information from a list of SQL Servers, particularly their patch level. I have a larger Powershell script that allows for selecting a set of options by entering their relevant number (1,2,3,4,5). I have been able to get database backups working on a single SQL server through this tool, but I cannot get a list of patch levels using DBA Tools. Specifically, the commands run but I don't receive any output through the tool. Interestingly, the same command does output when I use it via terminal on a single instance of SQL Server.

The option I am working to fix in my larger script is '3' - Check Patches. I verified the basic DBA Tools syntax works on a single instance via terminal as well as receiving a simple text output when option '3' is selected (just to confirm it is running as expected). The command below works and outputs in terminal like I want, but the larger function below it using the same syntax does not. The only difference being operating on a list of servers instead of a single instance:

WORKS:

Get-DBAInstalledPatch -ComputerName SQLINSTANCENAME

Unfortunately when I plug this same logic into a function, the output I receive is the following:

DOESN'T WORK: Function Input:

# Define a list of SQL Server instances
    $instances = @(
       "Server1",
       "Server2"
        )

            # Iterate through the list of instances
            foreach ($instance in $instances) {
                Write-Host "Checking patch level for instance: $instance"
                
                # Retrieve the latest patch level for the instance
                $patchLevel = Get-DbaInstalledPatch -ComputerName $instance 
                
                # Output the patch level
                if ($patchLevel) {
                    Write-Host "Latest patch level: $patchLevel"
                } else {
                    Write-Host "Unable to retrieve patch level for instance: $instance"
                }
}

Output:

Select Operation...: 3
Checking patch level for instance: Server1
Latest patch level:
Checking patch level for instance: Server2
Latest patch level:

Why does no data populate for the $patchLevel variable when used in the script?