Just wandering did you take inspiration from sudoku book called a legacy continued just asked my because the summary look pretty similar not saying you copied or anything since your story so far is differ from hes
Just the first chapter shows that it is different than sudukos. Though the summary is similar there is only so much one can do to make a hp legacy story take place during Canon. It could be similar in alot of ways but the start of the stories are extremely different already.
I had just finished Hogwarts legacy when this idea occurred to me. The complexity of Magnus's family and his relationship with Voldermort and Harry Potter was an idea that occurred after reading Stepping Back.