Good morning, Irad.
The standard CQ message is really an all-call. I've not found this feature if it exists, nor have I found it in the forums.
My suggestion is for a modifiable CQ call such as CQ DX, CQ Europe, CQ AF, CQ Montana, etc. Because of the nature of VarAC, a more descriptive target could be used to eliminate confusion, as in CQ CO--is it Colorado or the state of Coahuila in Mexico, they both use the same state abbreviation.
For your consideration.
Ciao for niao...
73 de Savi W1SAV
read this
https://www.varac-hamradio.com/forum/feature-requests/specify-cq-calls-like-cq-vk-cq-dx