I have main site. I want to use xenforo for forum but I don't want to offer two different profiles so I want to keep both separate and on home page button I want to put my main site.
Yes, that is possible, as you can see from our own site - the Home tab links to a separate page in the domain root.
All of the functions are available no matter the device. The gallery tab is likely in the dropdown menu if there is no available space on the nav bar.
Like in facebook, whatsapp and other apps, I can see mobile photo gallery to choose pic but in xenforo I cant see.
You can definitely upload from mobile, I have done it. It might be an idea to say what device you are using.
After clicking on the upload a file button below the text editor in XenForo, you then need to select Documents from the Choose an action screen That should open to Images or Screenshots If not, tapping the 3 horizontal lines top left will open the Open from menu, after which you can select Images. This is default functionality on Android devices. All of these images were uploaded directly from my Android mobile device.
