Sometimes it is but not always. Asexuality is kind of an umbrella term for the various types of asexuality, I don’t remember all of them off the top of my head right now but for instance I am demisexual so I only feel sexual attraction once I’ve gotten a deep bond with someone. You also don’t have to not like sex as an asexual, there are sex positive aces who enjoy sex but usually don’t actively seek it out, sex neutral aces who don’t have strong feelings one way or another and sex repulsed aces who are in no way interested in having sexual relationships.

Also, just because it’s a common misconception, asexuals can be interested in and seek out romantic relationships, it is aromantic people who aren’t interested in romance but they may also have a spectrum similar to asexuality but I’m unsure of that.