When such button would be visible it would help to learn by more users that there is an accessible version.
I am not sure, if the accessible version is a great benefit for low vision users, it is mostly optimized for screen readers.
You may, of course, change the visibility. Just add this CSS to the <style>
section in your questionnaire layout.
.screenreader {
position: static;
top: 0;
height: auto;
overflow: visible;
}