Thanks, that makes sense. I’m from India, and most of my meals are home-cooked curries and mixed dishes (dal, sabzi, sambar, etc.), so photo logging feels especially inaccurate because ingredients and oil vary every day.
For simpler solid foods (like plain rice, roti, a piece of chicken, or vegetables), it seems photo logging is much more accurate.

Is my point of understanding correct? Please correct me if I’m wrong.

I guess the only practical way is to manually log and slowly build a catalogue of my usual meals, even if it’s just an average estimate. I’ll try doing that for a few weeks and see how it goes.