The problem with this, is that it is just for typing text not controlling your phone like you do with a keyboard, think ctrl + tab and other shortcuts. I wonder if you could develop such a mode where the virtual keyboard is sticky. There is that and the fact that the front screen is way too narrow on the Fold.
If they can fix a static noise problem with a SW fix and then flash a new SW version right away without reapplying a certificate, this would break my theory.
Possibly the fix is in an application which is not covered by the certificate.