Starting from 235 pounds I lost 55 pounds since April by restricting my feeding time window to 4 hours and I only exercise once every week or two.
An eating time window larger than 4 hours did not result in any meaningful long term weight loss for me. It must be 4 hours per day or shorter. 4 hours works great.
I barely made a change in my diet to eat healthier besides cutting out foods and beverages commonly known as being bad and I only drink water and coffee. I consistently begin to plateau and this process only stops with increased water intake and exercise, but mostly water intake more than 1 gallon per day.
In terms of effect size time restriction is most critical followed by eating food that isn't obviously unhealthy (e.g. anything containing added fructose), closely followed by drinking a gallon of water per day. Exercise is a distant next step but it has a big effect whenever loss plateau begins.
As I approach my weight goal I plan to expand my eating window by one hour per day per month until I plateau.