Surprisingly, there is a growing body of evidence linking the timing, intensity, and duration of light exposure to weight regulation. For example, one study from Northwestern Medicine shows that the earlier you are exposed to sunlight, the lower your BMI (body mass index) tends to be. If you're waking up late, this means you'll be less exposed to bright morning light, which could affect your body weight... though the authors don't understand the exact mechanism behind this. Is there a direct link between light exposure and body weight, or does this happen because light exposure affect your sleeping patterns, which are known to affect body weight?
A surprising study from the University of Alberta shows that sunlight directly affects subcutaneous fat cells, making it so that they don't store as much fat. This is consistent with earlier findings linking insufficient sunlight exposure to weight gain.
To sum it up: yes, waking up earlier and being exposed to bright sunlight is better for you in terms of weight regulation. In fact, in moderation, sunlight has a lot of benefits, so you should do that anyway.