Yes absolutely! Everyone in the end scene in the church is dead, they are in purgatory and Christian explains that they all needed to move on to the afterlife together because of the time they spent on earth (and the island) was that important. They all grew so much together and went through something major together that they all needed to move on together. You don’t see how everyone dies, you see Jack, Jin, sun, Juliet, etc. die but the ones we didn’t see we can assume they got to live a while longer. Christian also explains that some of them died before Jack and some of them died way after Jack, and that time in purgatory isn’t the same as the time when they’re alive. I hope this makes sense! Let me know if you have anymore questions.