I do want to highlight one thing:
This is the thread
where they enabled it. However I note they use SMF instead of phpBB. So it wasn't really a fair comparison for me to make.
The EA forums are using this plugin
which is not the same one this board would need
. It appears to be the same developer and the commit numbers are about the same. As well as his ability to spell in his commit comments... Still, it's different code that is interfacing with different code. It's not clear to me if the dev is more familiar with phpbb or smf.
I'd still suggest talking to the EA admins though. First to find out how many people access their forums that way. Second, tapatalk allow you to put your board in their directory under a system of categories. You might try to match up with how EA do theirs (personally I just searched their directory so have no idea where it is actually categorised).
I really don't see other decent mobile options for phpbb. There's Forum Runner
which seems similar to Tapatalk, but isn't as widely used from what I can tell. They also make you register just to see the plugin which is vaguely unfriendly. I see some mention of mobile forum themes which would kind of be an improvement, but still missing some nice bits that the mobile apps offer.
More people are using mobiles and tablets for accessing the net so it does seem like something a community would require. This might be it; it might not. But in the end I think something will need to be.