As well as signing state papers to bring them into law, the Queen is responsible for upholding and improving magical standards so this means testing new ideas thoroughly (the fairy squad assists here), reading reports on these things and giving the nod or not. No magic is allowed to be practiced without royal consent. But naturally witches and wizards are not going to be beholden to a fairy godmother willingly, as the monarch is well aware, so a system of rewards for doing the right thing is in place and the Queen oversees that too. Naturally this generates a lot of paperwork!
The Queen, rightly, takes pride in being reasonably approachable by her subjects and replies to letters send in to her, especially if they are from children and young people. Roxannadrell sees this as part of her remit to be a positive ambassador for the fairy monarchy.
Roxannadrell spends several hours a day on the differing kinds of paperwork so to make this bearable, she splits this into sections with royal visits, walking, riding (horses and unicorns), her beloved gardening and so on breaking the day up nicely.