Thank you so much for the excellent photos and the overview from the funeral of the late Pope.
A good photo of the Queen of Denmark has been difficult to find as you said. Especially one where the brooch Her Majesty wore can be identified with certainty. But I think that after having seen this photo of part of the front row it is safe to say that she wore the upper part of the Diamond Ivy brooch that once belonged to Hereditary Princess Caroline Mathilde. Queen Mary also wore it to the State Banquet for the Egyptian president last year: