I have my DFAS Form 702 and I wanted to know if that counts as my w-2 statement
No, it does not. A military W-2 is exactly the same as a civilian W-2.
Go to the DFAS website to request a copy of your W-2 - https://www.dfas.mil/legislativeaffairs/taxstatements/
You can download your W-2 directly from the mypay.dfas.mil website. Just log on with your CAC or PIV account.