Really don’t know why child renewals are taking longer surely if it’s a renewal it’s a straight forward hit.
1 or both parents have passports.
Child has existing passport
Child under age 12 has had passport verified by an independent person
Surely you would just get them done and out!
Total lottery. As I said in other thread apparently Glasgow will be getting their passport staff back from the DWP Universal credit processing on 1st July 2020