I’d like to be able to add in the time I ate my meals

That's easy. In the app, in Settings, scroll down until you see Additional Settings (after the stuff about linking your fitbit or apple watch). Turn on "Track Meal Time." Then, when you enter your foods, you will see in the lower right a digital time stamp that you can change as needed. :-) Hope this helps!

When posting your food there's a clock beside edit today, you can click on it and it'll open the clock and adjust the time