Usually in pullets you see more pigment in their comb at that age and their comb is darker is my only hesitation about your chick. Its comb does look a little cockerel-ish on second glance. Keep watching it over the next week. If its a cockerel its comb will grow larger and start turning pink.
Here are a couple of my pullet chicks around the same age. See how dark their combs are?
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And here is a cockerel, he may be a little older than yours. But see how his comb is starting to turn pink and growing bigger?
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This cockerel has more white on his face than I like to see though.
please watch if this cockerel ends up being a pullet. I had a pullet with such a comb. she was 2+ months old when I was sure she was a pullet. she is the one with upright stance. and she does lay beautiful #4-5 eggs.