I think Indian muslims are very much allowed to wear bindis tbh. The bindi belongs to every Indian.
I don’t know very much about Islam, so I don’t think I can properly comment on this. The bindi is native to Hinduism and Buddhism, and has strong ties to Hindu/Buddhist symbolism, but I suppose any Indian could wear one as long as they respect the bindi’s meaning?
If anyone who knows more about Islam/viewpoints on bindis within Islam can chime in, I’d appreciate it!