What if I tell you that we did? 
The Librem Key is a slightly modified version of the Nitrokey, to serve the use case that we in Purism are working on: a secure boot chain
And while it can perform the majority (if not all) the functions of a Nitro Key, in our use case it integrates with HEADS to provide a Tamper Evident boot chain.
Before saying that:
I would recommend you to read this article where we talk about what the Librem Key is, what is it for and specially the work that Purism in collaboration with NitroKey poured into creating the Librem Key, not only on the firmware side but also the modifications in the hardware, and adding the needed features for our tamper evident boot system:
I would also recommend you this article presenting Pureboot, our work at securing the boot process in laptops, which is the reason why we created the Librem Key
Lastly, you made this exact same post on more than one thread regarding the Librem Key. Our Forum rules clearly state: no double posting
I would not be mentioning this if it was a first time, but you have broken our forum rules several times, and I believe that some of my colleagues have already spoken with you about this.
Please respect the rules of this Forum: