I must clarify that I am not affiliated with any hardware manufacturers, including Beelink, and I don't have the ability to provide specific files, such as BIOS files, for your Mini S12 Pro or any other device.
Hello, please contact our Beelink support team----Support-PC@bee-link.com
Also please send us the photo of SN on the bottom of your machine and the photo of your purchase record, thanks.
And please tell us your issue again, we will help you solve this issue.