There is nothing wrong with waiting for sex in a relationship.
There is also nothing wrong with having sex right away in a relationship.
You can sleep with them on the first date - good for you, that is your choice. You can sleep with them on your wedding night - good for you it's your choice. You choose to never sleep together but continue a happy relationship? Good for you, it's your choice and your partner for understanding
You shouldn't shame people for the choice they make, there is no right or wrong way to do it in the world. Perhaps everyone each has their own version of right/wron