I can only make that claim with as much confidence as yours that a non-standard keyboard layout would protect you. By your own argument, how can you make the claim that using a different keyboard layout will protect you? Everyone has a different typing style and their keyboards have different sound profiles, so clearly the AI needs to sample enough data from you and compare it to a dictionary to individually on audio collected of your typing. How do you know that the characteristics of the keyboard layout play an identifying role in this kind of attack when the AI has no concept of which sounds correspond to which keys until it has done its training?

A pretty simple deep learning approach would be to take a large sample and first identify the individual key sounds. From there it can start associating the most common letters with the most common sounds and switch it around until dictionary words start coming out. Once it can identify individual keys you could even brute force it in a pretty reasonable timeframe. The keyboard layout is the least important part because the individual key sound output is going to vary keyboard by keyboard and even potentially user by user. If you used a password without dictionary words and used a different keyboard layout exclusively for entering the password that would likely defeat this sort of attack.