MS Graph API - activationLockBypassCode comes up null

Question

I'm trying to pull a report from Graph API regarding the Intune device field activationLockBypassCode. When done through Graph Explorer, I get a result.

Sample query through Graph Explorer:

https://graph.microsoft.com/v1.0/deviceManagement/managedDevices/6dc10fc7-xxxx-xxxx-xxxx-cad206f334f4?$select=activationLockBypassCode

Result from Graph Explorer:

    "@odata.context": "https://graph.microsoft.com/v1.0/$metadata#deviceManagement/managedDevices(activationLockBypassCode)/$entity",
    "activationLockBypassCode": "XXXXX-MC9J1-XXXX-H5JN-NY2L-XXXX"

However, when I try to call on the API myself through Powershell, I receive the following:

Query:

$URI4 = "https://graph.microsoft.com/beta/deviceManagement/managedDevices/6dc10fc7-xxxx-xxxx-xxxx-cad206f334f4?`$select=activationLockBypassCode"
            Invoke-RestMethod -Headers $Headers -Uri $URI4 -Method GET

Results:

@odata.context                                                                                               activationLockBypassCode
--------------                                                                                               ------------------------
https://graph.microsoft.com/beta/$metadata#deviceManagement/managedDevices(activationLockBypassCode)/$entity

Anyone have any clue as to why this is?