Do modern Orthodox Jews wait for marriage?

I’m 19 and part of a Modern Orthodox community, but we never talk about sex, so I’m not sure how it works. My community is a bit more “liberal” in the sense that most people I know date for 2–3 years before marriage (but don’t live together), and most people are not Shomer Negiah. I’m just wondering. it normal in more “liberal” Modern Orthodox communities to wait until marriage for sex, or does it vary a lot?