The phrase "affirming how" is correct and usable in written English.
It can be used when you want to emphasize or validate a particular way of doing something or a specific perspective.
Example: "The report is affirming how important it is to prioritize mental health in the workplace."
Alternatives: "confirming that" or "validating the way".
In the way it's choosing to reach a new audience, Showtime is affirming how old-fashioned even its most adventurous TV programming really is.
The Business Insider collectively gathered CEOs affirming how their time in the military taught them the necessary skills to be successful.
When I realized that I could change my life experiences by affirming how I want my life experiences to be - it liberated me!
The Higgs boson is arguably the most important science discovery of this young century because it helps unify particle physics under what is called the Standard Model by affirming how particles have mass.
Acknowledging and affirming how the individual in such a variety of spheres lives an uncertain future and confronts his or her personal impending death can pave the way for personal growth.
When a congregation says, "We are open and affirming," how is the reality of differing conscience even recognized, let alone honored?
"If this isn't re-affirming how bad my life is going to be because of my injuries, I don't know what is.
What I hope to remind you of is that college is not an arena to affirm how brilliant you are.
Fire Songs stunningly affirms how fertile this project remains, and how urgent as well as striking Harsent's vision has become.
Herbert S. Lin, a senior scientist at the National Academy of Sciences who recently jointly edited a report on the Internet and risks to children, affirmed how difficult it is to make secure, compelling sites for children into a successful business.
Google's search and various apps complemented the iPhone perfectly, and the existing Android phones merely affirmed how much better the iPhone was than everything else on the market.
