We shipped in a Surface for a cracked screen repair with a keyboard attachment. When we received the Surface back the keyboard wasn't included. Is there a way to get it back?

If you placed your detachable keyboard inside the box when sending the Surface Pro 8 for service, then Microsoft is required to return it.

Open a “Missing Item After Service” case with Microsoft.

Visit support.microsoft.com/devices → check service order → confirm if keyboard as received → contact support via chat and report a missing accessory.