Yes, it looks like the Crown Prince Couple were going to Poland together, part of their usual business official promotions. Now that they are King and Queen, and respecting the tradition of visiting Sweden and Norway first, King Frederik will carry on the planned trip alone.
From the Ministry of Foreign affairs.
"It has been decided that the King will carry out the official business promotion to Poland, which has been prepared for a long time before the change of throne became known. Following this, the King and Queen will follow tradition together and carry out their first joint official journeys, which include will go to Nordic countries. More about the royal couple's first joint official trips will follow soon."
https://via.ritzau.dk/pressemeddele...en-311-til-den-22?publisherId=2012662&lang=da