Does ROAS matter for a Awareness campaign?

Short answer: not really, and here’s why
There's no sale to measure a return against; Awareness campaigns exist upstream of any purchase decision, often long before someone is ready to buy at all. Judging an Awareness campaign by ROAS is like judging a billboard by how many people bought something in the next five minutes of driving past it.
Ask your agency this instead

Want the metrics that actually matter for a Awareness campaign? Open the tool and pick one.

Other metrics for a Awareness campaign
Sources

Adamigo provided the Awareness CTR and CPM figures. No Awareness-specific frequency data was available in research; the reversed frequency logic is a reasoned judgment call based on how brand recall generally works, not a cited benchmark.