He is currently in London for the court proceedings which are expected to conclude on Thursday. Unfortunately, the schedules of his father and brother do not align with his time in the UK, meaning they will not be able to reunite.
King Charles is reportedly not in London or Windsor, despite being in the country at the same time as Prince Harry. He will be leaving for a state visit to Germany on March 29 after his planned visit to France was cancelled due to ongoing protests.
Meanwhile, Prince William is occupied with his family over the Easter holidays and is not in Windsor.
Additionally, there have been reports that Prince Harry and his wife Meghan Markle have been asked to vacate their UK home, Frogmore Cottage, and he is still involved in a legal case against the UK Home Office regarding his security in the country.