EEG-based neurofeedback in athletes and non-athletes

more or less same crap is achieved via radiomyography from your local telecom towers. down to deciphering your inner monologue

Were this the case, it would be trivial to read the internal monologue from your brain activity with a device placed on your head. Can you find me examples of medical devices that can do this?

here's an example - you can download and run code for yourself https://github.com/CNN-for-EEG-classification/CNN-EEG

That’s just a library that applies a CNN to EEG, but that doesn’t show that it can actually extract text reliably. As far as I know, the machines that successfully do that use the nerve signals to vocal muscles, not the brain directly.