@Jeb Million Yes, UAE is not a supported region for Azure speech service. Although you can create a multi service cognitive service resource in UAE North it does not support speech to text.
The work around in this case could be to use Azure Speech to text container on-prem and use the billing endpoint or resource from another region. This ensures your data is on-prem and the container only talks to the endpoint to update the billing info. I hope this could help.