Hi @Shreya Ghosh
Teams tag is mainly focused on the general issue of Microsoft Teams troubleshooting. Since your question is related to Teams Development , which is not in our support scope. The following suggestion is just for your reference:
The API for creating approvals has not been officially launched yet. To get this feature more quickly, you can send a feedback directly to Microsoft Feedback to add it in future updates.
Many features of our current products are designed and upgraded based on customers’ feedback. With requirements like this increase, the problem may well be released in the future.
Thanks for your understanding and support.
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