Yes and no.
Every chapter in your thesis will be read by your examiners. Everything will be considered.
In reading it though, examiners may find things they particularly want to focus on in their thinking and then in the viva. There may be elements they need to spend more time on. You may have chapters about difficult, tangled-up topics. You could have results that rebut long-held beliefs. Some chapters might just mean more to your discipline, to the thesis or to you.
Yes, all your chapters will be considerd, but in the viva some may have more time spent on them than others.
And that’s OK!