In Screen Reader Mode (v 3.1) it is not possible to use and edit regular Confluence templates.
To solve this problem, an administrator can create barrier-free templates, see Creating Barrier-Free Templates (v 3.1).
In screen reader mode, all available barrier-free templates are shown above the title input field.
You can insert a template by clicking on the radio button and then "Apply template".
Image 1: Applying an accessibility template (click to enlarge)
After applying a template, the template's text will appear in the text area below.
Eine Zeile frei lassen zwischen letzter Textzeile und der Fußleiste