I don’t have much experience with Silkies at all, but the comb looks like the pea comb on my Ameraucanas, Brahma, & Easter Eggers.
Here’s a random young cockerel ameraucana, I believe, for comparison next to yours. With pea combs the females have a larger row in the middle and the two side rows don’t really even show up (in my five hens anyway), and the males have three rows you can easily see even at a young age.
So if your Silkie has a pea comb (which I’ve never heard of, but I don’t know much about it!), then I’d guess boy based on the comb.