I doubt Adobe will have given time to cater for anything required by Apple in iBooks Author.
However, in the iBA HELP files you will find:-
You can add an HTML5 widget (with the extension .wdgt), which you can create with a text editor or by using a web content creation app... and much more information
Your HTML needs to comply with iBooks Author. Its advisable to become familiar with what is acceptable before using time to create media.
Using HELP within iBA, under WIDGETS ( interactive material) - you will find information which may be useful.
There are also a number of HTML realted discussion on this forum which you can find by doing a forum search.
Other than this, the suggestion to contact iBA support is your best option but may take a few days.