Unable to install Windows 11 on ASUS B450

Here is my config:  
CM: ASUS B450 MA
Processor: AMD Ryzen 5 2600X
Ram: 16 GB Crucial
Storage: 1 NVME 1TB
 
Until this weekend everything was working fine I was running Windows 10. I had already noticed that I couldn't update W11 because I wasn't compatible because of Secure Boot, TPM and GPT.
I had a little time and I wanted to tackle that.  
Except that it is impossible to install it.  

Things I've already done...
- I created a key with rufus since otherwise the windows utility creates it in mbr... therefore impossible to install...  
- transform my disk into GPT on another PC
- updated cm bios to the latest version
- put the secure boot in uefi windows mode
- disable CSM in bios  
- TPM is ok normally
- I reset the bios, by the bios, but also with removal of the battery and clearcmos. Same.  
- when you download the bios from ASUS it is noted that the default configuration of the bios allows you to install W11 but in fact no
 
I can install Windows 10 and switch it to an MBR disk obviously.  
 
I don't know what to do anymore. I'm convinced it's a bios problem, that's all there is to it...