Hello TPolk-3066,
Thank you for contributing to the Microsoft community. We are happy to help you!
Based on your description I understand you are getting an error message "Couldn't send the verification code" when you try to edit the poll. To investigate this issue I advise opening a service request in the Microsoft 365 admin center for this issue to be checked from the back end. This case requires the technical support team to collect some logs to investigate the root of this issue. As we belong to the community, we have limited permission, so it is suggested to open a ticket with the Microsoft Technical team, so they can check remotely and assist you further. At this point, I highly appreciate your kind understanding and cooperation.
To open a ticket: Get support - Microsoft 365 admin | Microsoft Learn
We look forward to your response. Thank you for your cooperation.
Sincerely,
Microsoft Community Moderator