Thanks for using Apple Support Communities.
I understand that when you try to print from a number of different apps, you aren't seeing the preview of the document that you are printing. I would want to make sure that I see the preview as well when I print. Let's see how we can get this resolved.
I would advise to make sure that the printer software is up to date on your Brother DCP-7065DN printer. Please choose 'Software available' under Brother in Printer and scanner software for macOS Sierra, El Capitan, Yosemite, and Mavericks
If there is a software update available, please install, and then test and see if you get the same result.
Have an amazing day!