Need help in display technique in drum-machine project react

Do not open if you have not completed this project

I did manage to complete my drum machine project but i am not satisfied the way i displayed can u look into my code and see how can i improve the way display state is updated. currently i am passing data from child to parent to parent and then display it. if i use display in child it will repeat for all pads because i am using .map . Next i am starting calculator and it would be nice if I get some help.
look into my code