@Forry Meks Thanks for reaching out to us. I don't see there is any access approval needed in Azure Speech Services.
Please follow this document having a try and let us know if you have any issues during the way - https://learn.microsoft.com/en-us/azure/ai-services/speech-service/batch-transcription-create?pivots=rest-api#use-a-whisper-model
I hope this helps.
Regards, Yutong -Please kindly accept the answer and vote yes if you feel helpful to support the community, thanks s lot.