While I did see the screen shot I believe poster would like to have DDG populated in the server domain suggestion field once xmpp texting is selected.

(different screen shot would be required)

Other [platform specific] clients of note:

Conversations, android
Xabber Dev, android
Yaxim, android

Psi+, cross platform
Pidgin, cross platform
Jitsi, as pictured in screen shot, cross platform

ChatSecure, ios or android

Each of which afaik has a domain suggestion option [for JID creation]

only mentioned are those clients capable of both OTR and appropriate secure connections to server.
posted by buggleme 3 years and 3 months ago Link