Just tried to set up #CollaboraOffice on my phone. Selecting a document works fine because it uses the native #iOS files view, but once you open a document you will be greeted with this:

"Screen reader support for text content is disabled. You need to enable it both at server level and in the UI. Look for the accessibility section in coolwsd.xml for server setting. Also check the voice over toggle under the View menu."

In other words, there are probably settings which I need to change that I have absolutely no access to. Well done, champs.