First of all, what is you and your wife’s current status in the US? You’ve gone to great lengths to describe your children’s status, and no mention of yours. Currently “residing in the US” is not enough to make you eligible for AOS.
1. Your child’s current pending AOS petition has no bearing on yours. It is possible for one person to have multiple AOS petitions in the system at the same time - this is legally allowed.
2. If your kid is already a LPR (not PLR by the way), they can’t be included as your wife’s derivative.
3. You already got the response we recommend on the AOS process spreadsheet, so ......
Thank you! LPR (not PLR) is noted
Both I and my wife are in our employment-based non-immigrant status, have been in the US for more than 5 years and never been out of status. Based on what I have read so far it seems we should be eligible for AOS. Am not planning f2f checking with an USCIS office (they all seem to be booked for appointments for quite a few weeks anyway).