Sharepoint Online list items query returns empty array with Microsoft Graph API

TLDR: I am trying to get the list items of a Sharepoint Online list with the Microsoft Graph API in Powershell. But all I get back is an empty array.

I have created an application in Azure and given it these permissions:

I know it's way too much permissions for what I need, but for the sake of troubleshooting and making sure it's not a permission issue, I added them all.

This is the code I use to get the Graph API token:

$TenantId = 'my-tenant-id'
$ClientId = 'my-client-id'
$ClientSecret = 'my-client-secret'

$Body = @{
    'tenant' = $TenantId
    'client_id' = $ClientId
    'scope' = 'https://graph.microsoft.com/.default'
    'client_secret' = $ClientSecret
    'grant_type' = 'client_credentials'
}

$Params = @{
    'Uri' = "https://login.microsoftonline.com/$TenantId/oauth2/v2.0/token"
    'Method' = 'Post'
    'Body' = $Body
    'ContentType' = 'application/x-www-form-urlencoded'
}

$AuthResponse = Invoke-RestMethod @Params

$Headers = @{
    'Authorization' = "Bearer $($AuthResponse.access_token)"
}

When I run the following command, just to get the list info, it works.

$SiteID = "my-site-id"
$ListID = "my-list-id"

$url = "https://graph.microsoft.com/v1.0/sites/$($SiteID)/lists/$($ListID)"

$Result = Invoke-RestMethod -Uri $url -Headers $Headers -Method Get -ContentType "application/json"

$Result | fl

This gives me the following result back:

@odata.context       : https://graph.microsoft.com/v1.0/$metadata#sites('abc.sharepoint.com%2Csite-id')/lists/$entity
@odata.etag          : "list-id,1139"
createdDateTime      : 2020-09-22T08:18:49Z
description          :
eTag                 : "list-id,1139"
id                   : list-id
lastModifiedDateTime : 2020-10-21T14:53:18Z
name                 : list-name
webUrl               : https://abc.sharepoint.com/sites/my-site/Lists/my-list
displayName          : my-list
createdBy            : @{user=}
lastModifiedBy       : @{user=}
parentReference      : @{siteId=abc.sharepoint.com,list-id
                       cca2b90}
list                 : @{contentTypesEnabled=True; hidden=False; template=genericList}

So I know my authentication with the Graph API works.

But then when I want to get the actual list items, I get an empty array back.

Command:

$SiteID = "my-site-id"
$ListID = "my-list-id"

$url = "https://graph.microsoft.com/v1.0/sites/$($SiteID)/lists/$($ListID)/items?expand=fields"

$Result = Invoke-RestMethod -Uri $url -Headers $Headers -Method Get -ContentType "application/json"

$Result | fl

Result:

@odata.context : https://graph.microsoft.com/v1.0/$metadata#sites('abc.sharepoint.com%2Csite-id')/lists('list-id')/items
value          : {}

I have no idea what the issue is. Similar posts on here made me think it's a permission problem. But I've thrown every permission in the book at it and it's still not returning the list items.

Help would be greatly appreciated.