If that TDEE estimate was clearly on the high side, where you considered both exercise the TDEE chart talks about, but also daily life activity it doesn't, to come up with 3-5 hrs weekly - then it's too high.

Drop 200 cal's daily.

But, 3 weeks isn't long enough for a woman, since your BMR literally changes through the month.
And after starting a new lifting program, especially so.

The increased size all over leads me to believe it's NOT just water retained for repair, unless you are mainly measuring muscles you are using in the program that are under repair.

So wait for the 4th week, confirm only weigh-in is valid day to minimize known expected water weight changes.
Morning after rest day eating normal sodium levels, not sore from last workout.

And then from there see if dropping 200 is correct.

So walking time counts at 1/2 time, but it does count, when does as exercise.

But then again - some of those steps are part of normally already accounted for daily life.

So steps can't really replace what you need to know - calories burned.

But, do you have steps because you have a daily activity tracker attempting to give you daily TDEE values?
Do you manually log the lifting workout for more accurate estimate of calories burned?

If that is the case - don't try guessing from 5 rough levels - use your device to give infinite levels.