Hi @Zhan Chou Feng
Thank you for posting your question in the Microsoft Q&A forum.
I understand you're looking to automatically send a confirmation message in Teams right after a user submits a form. From my research, the best tool for these issues is Power Automate. As a moderator, while I don't have the resources to build out a detailed lab environment for your specific form, I can certainly guide you on the correct pattern to create this solution yourself. The process involves creating an "Automated cloud flow" in Power Automate. I've conducted some research within the limits of the resources I can access; however, I am not able to help you further since Power Automate is beyond my scope. Please access Microsoft Power Automate
The workflow looks like this
Based on my research and understanding of the platform, I found users who needs to solve with a similar issue as you. I hope thread below will help you resolve the issue as quickly as possible.
Send a message to Teams after you submit the form - Microsoft Q&A
Common ways to use a form in a flow - Power Automate | Microsoft Learn
I hope this information can help you to solve your issue soon.
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