No, by default trying to access a directory with no index file will result in an access denied error- that’s to be expected. You can change that using .htaccess rules.
However, I would like to give the friendly reminder that using your web hosting account for file storage or to share downloadable files is against InfinityFree’s TOS. May I ask what you’re trying to accomplish? There may be a more efficient way of doing it.
InfinityFree and aeonfree are both built on the same provider and use the same backend, but they’re separately owned. The owner of InfinityFree can’t see any see or manage any accounts you have with aeonfree, and vice versa.