Hello @Konstantin_Kozhin and welcome to the Community!
My current understanding is that publishing to Tableau Server can be done by exporting data to a TDE first, and then using Run Program transformation to run tabcmd and publish the TDE to the Tableau Server (see tabcmd publish). Having a dedicated transformation for this would be more convenient, for sure, although the current approach should do the job, if I'm not missing anything. At this point we're focused on providing functionality that can't be achieved or is difficult to achieve by other means, therefore publishing to Tableau Server is not planned for the next release, but rather on a mid-term product roadmap.
If there is something that I'm missing, or maybe there is a case which is cumbersome to do using tabcmd ?