(1): It's not yet.
(2): It's comming in next releases.
(3): Does it happen all time? It's much depend of api response.
(4): All color can be customized in next releases.
(5): Of course. It's will have ;)
A native mobile apps (iOS and Android) for XenForo forums.
A extended api add-on: https://nobita.me/resources/tl-api.73/
Apple developer account if you want to upload to AppStore. Cost yearly at: $99
Google developer account if you want to upload PlayStore. Cost...