Why are my cal counts on Fitbit always insanely high

I’m 250lb, 5’2 female and I’m 13k steps a day active but otherwise not doing insane exercise right now, yoga 2-3x a week but I used to do competitive lifting (don’t anymore). I know Fitbit is usually wrong but I’ve seen others say the daily burn estimates are pretty on par for them with tdee calcs. All my calcs have me between 2700-2900 (I’m fat lol) at moderate or light exercise. I’m just curious mostly bc I don’t eat my cals based on this, but I am losing weight rn. Just curious why it’s so damn high