Welcome to the Community - thank you for your question!
This should show as a separate line named 'Standard Purchase 20%' - so you should have two lines named this, one for your 20% S figure, and one for your ECG code. If you are using the 0% code, this will show as EC Purch of Goods Zero-Rated (0%). Do you have neither of these lines show on your report?
It comes through on the vat liability report described as "Zero-Rated Purchases (0%)". No mention of ECG
Is there a way to vhange this description on the report even?
There is not any way to change the reports to this level of detail, are you using the 0% ECG code?
You can request this section of the books to be enhanced, using the CogWheel and Feedback options.