I can't give a definite answer to that question. I have to trust God's character and believe that He will do what is right. Does Jesus appear to people who have never heard about Him in the last moments of their life, or just after they die, and give them a chance to respond? I don't know, but that wouldn't be inconsistent with His character. He desires that no one would be lost.
For us, though, it's a moot question. We are being given a chance to respond right now. If you still have questions, our church and many others have people who can help to answer them. We have heard, and that brings responsibilities.
This doesn't mean, however, that I don't care about those who haven't heard. If Jesus is who He said He is, then knowing Him now would enrich their lives. That is why Christians expend time, service and money to make sure that everyone gets a chance to know who Jesus is. The best response to such a serious concern is to be part of the answer.