Weight loss but no calorie deficit?

Hi all,

Wondering if the community can help me make sense of my experience

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Started 0.25mg shots 3 weeks ago (will take shot four in a few days). I'm noticing some side effects, still some intense food noise. No biggie it's to be expected.

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What is unexpected is that I've lost approx 3kg in this period while still averaging 2700kcal each day. Range between 2200-4200kcal.

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I'm wondering if we expect changes like this due to the medication and if so, what's going on in my beautiful, wonderful, magical body? What are your thoughts?