I am using a Macbook Air M1, 2020 model, and I bought it last June, and some weeks before I got a battery backup of 10 hours, and now my battery backup is around 5 to 6 hours only, is it because of any problem or just because it's like that.
Battery BackUp Issue With Mac
Welcome to the forum.
That's not a developers' forum question. You'd better post and get better feedback on Apple Community: https://discussions.apple.com/welcome
Good continuation.