Hi Soumya Ranjan Samal,
Thanks for reaching out! To help us assist you better with your Surface Pro 9 keyboard issue, could you share a few quick details like what exactly is happening (e.g specific keys not working or the whole keyboard being unresponsive), whether there are any error messages, if the keyboard is being physically recognized, what model you're using?, and when the issue started? (especially if it followed a Windows or driver update)?
While we wait for more info, you can try some basic troubleshooting: disconnect and reconnect the keyboard, restart your device, check for updates under Settings > Windows Update, test the keyboard on another Surface if possible, and boot into UEFI (hold Volume Up while turning on) to check if it works outside Windows. You can also run the Surface Diagnostic Toolkit, which helps detect and fix common issues automatically.
If the problem continues, you can contact Microsoft Support via https://support.microsoft.com/en-us/contactus, where you can choose your region and device for tailored help. For service or repair, visit https://support.microsoft.com/en-us/surface/how-to-get-service-or-repair-for-surface-b06da716-0763-65b3-e2f2-116d9e30f877.
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Best,
Carl