iphone 6
latest ios
in dropbox ios app (and on Mac Desktop), both my DB accounts show up.
In mail, go to "attach file" and no DB accounts show up in Locations.
In ios Files, no DB accounts show up in Locations.
This happened last time there was a major ios upgrade, and we had to stand around while DB blamed Apple.
(Please join this with the same issue feedback I just sent, that DB just acknowlkedged with a link that I can't open using these credentials - add feedback to THIS Q&A please, not the other way around)