hope you guys doing well

Let me describe my ILR application here. I'm going to apply for ILR (Tier2/Skilled worker 5 year route) on Monday 29th April 2024(immigration agency will do application for myself, as the company only supports employer with ILR applications). Due to this I'm going to apply for ILR(Tier2/Skilled worker dependent 5 year route) for my wife and child separately, but intend to apply on the same day for all of us.
Documents which are needed for myself are pretty clear, as anyway they supported by immigration adviser.
But I would like to list the documents which I will provide for my dependents:
Documents for Spouse/child:
1. Passport
2. BRP
Documents for Spouse:
1. Life in the UK test Pass notification letter, reference number included in the application;
2. English language test certificate, reference number included in the application;
3. Bank account statements for recent 3 months, is it required, as it is provided in my application?;
4. Recent 3 months payslips, is it required, as it is provided in my application?;
5. Marriage Certificate;
6. Tenancy Agreement of last 5 years with both of our names on them;
7. Council tax receipts for last 5 years with both of our names on them;
8. Water utility receipts of last 5 years with both of our names on them;
9. Gas utility receipts of last 5 years with both of our names on them;
10. Letter with description of absences? Is it needed, as we are not exceeding 180days rule anyway? And my company is providing this letter for my application, the only thing is application made separately. If we need it how it should look like?;
Documents for a child:
1. Birth Certificate;
2. Letter from school, is it required? he is 7 years old;
Is there anything missing?
One more question:
- I could not find the place in SET (O) form for dependents, where I can mention my ILR UAN (Unique Application Number), should I put it under "their Home office reference number" field?
Thank you very much!