@Sebastian Claesson Welcome to Microsoft Q & A Community Forum and thanks for detailed information. As you are already aware that there are no aliases available Microsoft.Resources/subscriptions. Support for requesting aliases is now handled by Azure Customer Support. Open a new Azure Customer Support ticket if you believe you need new aliases to be published.
If this answers your query, do click "Accept as Answer" and click "Yes" for the same, which might be beneficial to other community members reading this thread. If you have further questions, kindly revert with further information so that we can assist you accordingly.