@kevin1 is pretty spot on with what he’s saying, so I won’t totally repeat. In short, yes it’s been considered and it’s a good idea because it would help to train models on our end (and it can help troubleshoot specific detection issues). In that manner, it’s something we plan to implement in the future. However, it would be less useful in the form of some immediate training feature. We wish it was that simple.
This has also been discussed extensively here, I would encourage you to make your opinions known in that thread since it’s the actual “feature request” thread: Allow us to provide a list of devices before they're detected