We also fly in 4 weeks. Been stuck on docs received since 5th April.
After 30 minutes on hold i spoke to someone who confirmed my daughters 1st passport is with an examiner and that it’s being processed. Not sure why the website hasn’t updated to reflect this.
The person on the phone also confirmed (and double checked) that the upgrade service IS available to 1st child passports. Good luck everyone, sounds like we’re all stressed together.