Why are Dan and Ephraim not mentioned with the 144000 in Revelation?

Dan and Ephraim are not mentioned among the 144,000 in Revelation 7, which lists 12,000 from each of the twelve tribes of Israel. Some interpretations suggest that this omission may be due to Dan's association with idolatry in the Old Testament, as seen in Judges 18. Additionally, Ephraim, being part of the northern kingdom of Israel, is sometimes viewed as representing a larger collective that may be encompassed by the tribe of Joseph, which is included in the listing. This reflects the complexities of biblical lineage and the symbolic nature of the tribes in apocalyptic literature.