A 655 on GMAT Focus is actually a solid score, especially for a first attempt. Your Quant (90) and Verbal (83) are strong and show clear academic capability. The only real drag is DI, which is also the most improvable section with targeted practice.
For Australian schools:
Melbourne Business School (MBS) – 655 is within range, especially if you have strong work experience, leadership exposure, and a good story. Their class averages are competitive but not rigid.
AGSM (UNSW Sydney) – 655 is definitely competitive, and many admits fall in this range with a solid profile.
You’d also be competitive for schools like Monash, Macquarie, Deakin, UQ, etc.
If your profile is strong (brand-name work experience, impact, progression, leadership), this score will not be a deal-breaker for these schools.
On retaking:
A retake makes sense only if you’re confident you can push DI into the 80+ percentile range.
Even a +20–30 point bump (675–685) would materially strengthen your chances, especially if you’re aiming beyond Australia or targeting scholarships.
If timelines are tight or this was a mentally draining attempt, you can still apply confidently with 655, particularly to Australian programs.