Hi guys,
So, apparently there has been a challenge in getting vouchers after competing the Microsoft Ignite challenge: Microsoft Fabric. This is mainly because the challenge progress is not updating after completing all the modules. This results to Microsoft contacting you, requesting that you finish the modules so as to get the free voucher.
The best way to resolve this and get a voucher is to send back a private message to whoever contacted you with a screenshot of the email you received after completing the challenge and one for modules completed page. You can also send the same (indicating your fabric community username) via email to fabric-ready@microsoft.com I hope it helps someone.