When iPhone X was launched I bought and used it and then it took a short time to change from it to iPhone 8 Plus which has Touch ID. The reason why I changed was because Face ID wasn’t reliable and better than Touch ID. After several years my iPhone 8 Plus was broken and I bought iPhone 11.
Still Touch ID is better than Face ID. I don’t know how difficult putting Touch ID into the screen of iPhone is. Then I think that Apple is still working on it. Recently Samsung tried it and then I read comments saying many users do not satisfy with it.