Do non-Jews or non-Noahides go to heaven?

Question Shalom Rabbi, I am a Noahide and live by the 7 Noahide Laws. Though I have many friends and loved ones who follow a myriad of different faiths, mostly Christians, among other denominations. My question is one regarding mercy. I know many people do not follow the Noahide code out of ignorance, not malice. I would like to know if they would be given a chance to repent after getting confirmation of the Truth of G-d. In other words, do all non-Noahides inevitably disappear after death with no possibility of repentance and a share in the world to come,...