Yeah, definitely offer it as a choice if you’re allowing the reader to customize.
It’d be unsettling if you let readers customize, but not give the choice for them to choose if they want to wear one or not.
If someone customized the MC to look white, and they had to keep the Bindi, it would look a bit strange.
Other than that, I think that is a great idea for representation. I’ve read a story where the author let readers decide if they wanted to wear a Hijab (while customizing) and I found that very amazing! I don’t wear them, but I was so happy that those who do wear them the opportunity to wear them!