Hello VERMA
Thank you for posting in Microsoft Community.
I appreciate you raising this concern to us, and to answer your question:
While the Surface Pro 8 and Surface Pro 9 have the same dimensions, we cannot guarantee that the Brydge SP+ keyboard for Surface Pro 8 will fit perfectly on your Surface Pro 9. It is always recommended to use accessories that are specifically designed for your device to ensure compatibility and avoid any potential damage.
As for accessories to make your Surface Pro 9 stand on its own without the stand provided, there are several options available. You can consider purchasing a case with a built-in kickstand or a separate stand that is compatible with your device.
Hope it helps!
Regards,
Rolando S.