Baby fully bf, still perlu susu formula atau x?

Hi smua. My baby da 8m23d n his fully bf. Mknn lain mcm bubur nasi, baby cereal, rusk biscuits, fruit n air kosong die mkn n minum. I just not sure n wondering, baby perlu kn susu formula ke x. Or cukup ngn bf je. Hope someone can help me. Tq