The current president is someone named Biden. 20 January, ex-President Trump become our next President Trump. "As I was saying...."
In the interim and with full recollection that contact for incoming members of the previous Trump administration BEFORE the inauguration led to the mistreatment of Gen. Flynn and impeachment accusations against President Trump about phone calls, it is likely that -- wait for it -- the US is still being represented by Biden and Blinken, and the incoming Trump team is being VERY careful not to give the "lawfare" Democrats and "never-Trumpers" any leverage at all.
Biden -- horrid man that he is -- is President through until the inauguration. How about that?
The Trump peace plan is ready. General Kellogg will be reviewing it with Ukraine and key European leaders in a week.