My buddy's I-130 is at NFC for his wife but not her 8 year old child. Got the message 'The petition you have filed does not allow derivative status for family members. This means that any spouse, unmarried child under age 21, or parent will require their own petition to immigrate."
So I assume this would requires a new I-130 for the child with the same processing timeline as for the wife. (Roughly six months).
The child's US tourist visa expires in 2026. Should she just enter on the tourist visa and then do an adjustment of status?