Funny, AGI is the first line under "Adjustments to Income" on my transcript and my whole 1040EZ transcript is a single page in length. Am I confused or are you confusing the transcript with the form itself?
Here is a sample IRS transcript.
On this sample, adjusted gross income is the seventh (and eighth) line on page 3 of 6 pages. It is also the last line under Adjustments to Income.
On the transcript, look under section "Adjustment to Income" and find the amount for Adjusted Gross Income. If it shows as zero, then it's "0".
If you did not file in 2018, your Adjusted Gross Income is $0.00.