commercial use

Hey @rayanv 
The short answer is yes you can, as long as Adobe Watermark isn't generated on your image. 

Here is an article about your inquiry.
https://helpx.adobe.com/firefly/get-set-up/learn-the-basics/adobe-firefly-faq.html#:~:text=Can%20I%2....

As long as there is no Adobe watermark, you can use the image; this is how I understand the article.
Adobe Watermark: can't use for commercial or publication.
No watermark: you can use.

Using Firefly

 Can I use Firefly-generated outputs commercially?

For features without the beta label, you can use Firefly-generated outputs in your commercial projects. For features that are in beta, you can use the Firefly-generated outputs for your commercial projects unless explicitly stated otherwise in the product.