It really depends on the company what kind of question you're going to get. Doing leetcode is to cover your basis and solidify your knowledge for whatever they coudl ask you. It's like college exams, they give you 1000 facts to remember but test you on 100.
I agree its kinda silly but I think it's more just so they can hear your thought process more than if you can actually solve the problems. So focus more on communication and you should do fine