With respect I would have no idea as I am not God. But if they die with mortal sin on their soul they are in risk of going to hell. If they die with venial sin on their soul they will undergo the purification of purgatory. I assume that if upon the knowledge they are at death’s door they make a full contrite repentence for their sins to God they will be forgiven. Once forgiven of their sins they need not fear hell. But it would be wrong for any Christian to presume they will get a last minute chance to be God’s mercy. So we should always be in readiness to meet our maker.
Seen a lot of Catholics including priest claim that you guy won't know if you are saved until you see Jesus face to face, at the judgment...