Uh...excluding the very recent cuts this year under Trump; the number of civilians in the US Federal work force has gone up fairly steadily. [0]
We had 23.592 million civilian employees in Jan 2025. 21.779M in Jan 2021, after being largely stagnant overall the previous 10 years. That's a net change in excess of 1.8M employees under Biden.
I do find it interesting that it appears that employee count was flat, or even down under Obama, but until COVID, there was a steady increase under Trump v1.