Hello B Ingerson,
Thank you for reaching out to the Microsoft Community and I'll be glad to assist you today.
I understand you are experiencing issues with the BitLocker recovery screen, where you are unable to input any characters from your keyboard.
- Have you tried using an external keyboard to see if it works on the recovery screen for typing your recovery key?
- Did you try using the On-screen Keyboard option, if available?
You can also try disabling the 'Fast Boot' option in the BIOS menu to see if it helps. To do this, turn off your PC completely, then turn it back on. When the manufacturer logo appears, press F2, Del, or ESC to enter the BIOS menu. Check if the 'Fast Boot' option is disabled.
For the keyboard not working to input Bitlocker key see the related article for your reference:
https://www.dell.com/community/en/conversations...
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Related discussion thread for your reference:
https://answers.microsoft.com/thread/fda262a6-e...
I hope this information helps. If you have any questions, please let me know and I will be happy to help you further.
Best regards,
Gunasekar N