Although brace require some adaptation, for sure, they will not affect your singing voice. After correcting your teeth, your voice will get even better. Singing is usually affected by the vocal cords, so if the vocal cords are healthy, then you shouldn't have to worry.
Do straight teeth make you sing better?
Practice is the only thing that can make you a better singer. Nonetheless, wearing braces doesn't hurt your voice. In fact, it can help improve it. The straighter your teeth are, the fuller your tone and timbre are.
Can teeth affect singing?
Your teeth pair with your tongue, lips, and vocal cords to effectively create noises. If you don't properly care for your teeth, you don't just put yourself at risk of gum disease and other conditions, but you may also affect the way you speak.