I wouldn't say they survived being nuked. One hitched a ride off the planet, infected a dog/cow, and was later killed; and apparently another hitched a ride in

I wouldn't say they survived being nuked. One hitched a ride off the planet, infected a dog/cow, and was later killed; and apparently another hitched a ride inside of Ellen. Since neither were present for the nuclear blast I wouldn't say they survived it. Ellen/It were later cloned to recreate xenomorphs, but I don't think there is anything in the canon to say that the xenomorphs which were nuked were able to survive. Nuking xenomorphs from orbit does seem to be a very good way to be sure.