What does a credit approval report consist of?

Not sure in what context is your question related to.

Did you mean the report from Credit Bureau Singapore for submission to HDB for loan eligibility etc?

https://www.creditbureau.com.sg/why-credit-repo...

From CBS website:

Your credit report is a record of your credit payment history compiled from different credit providers.

As most lenders will check your credit file to assess your credit worthiness prior to making a decision, a good credit repayment history will make it easier for you to obtain credit and to qualify for loans.

By reviewing your credit report regularly, it allows you to be aware of any information that is uploaded on your credit file.

The other advantage of monitoring your credit file is that it protects against possible fraudulent use of your personal details to obtain credit.

Example of a credit report and what it covers in this link:

https://www.creditbureau.com.sg/enhanced-consum...