Different results from Azure portal vs Azure Powershell modules

### Description

It's entirely possible that this is just user error on my part, but it seems like odd behavior to me. My apologies if this is something dumb. Basically when I run:

get-azroledefinition helpdesk*

I get an error back that states the following:

WARNING: No role definitions were found with those conditions.
WARNING: If the role was created recently keep in mind there's a slight delay between creation and public view.
WARNING: Please try again later.

If I run:

get-azroledefinition | where {$_.name -like "*Help*"} | select name | sort Name

I get a blank return.

I have verified that I am in the correct subscription and tenant and that HelpDesk Administrator is a valid built-in role. Thanks in advance for any help you can provide!

### Script or Debug output

_No response_

### Environment data

_No response_

### Module versions

7.1.0

### Error output

_No response_

Start by reproducing both Get-AzRoleDefinition commands in the reported Azure subscription and tenant, then compare their results with the Azure portal's Helpdesk Administrator role. Check the behavior against module version 7.1.0. Done means the discrepancy has a confirmed cause and is fixed or clearly documented.

Written by the indexing model from the issue text.