What a weird way to phrase a question. If you’re accessing Pornhub from Australia, it will probably result in a feed more algorithmically suited to Australians, and if this feeds happens to feature Australians, they’ll have the Australian accent.

Accents are not a factor, but the location of the upload, tags, and title are, which indirectly makes accent a factor. Unless we’re talking about kinks, PH won’t recommend videos based you your accent alone.