I’ve noticed the same thing and it really surprised me too. It feels like most smart TVs these days come with some kind of ads or pre-installed apps you can’t fully get rid of. From what I’ve seen, it’s just how a lot of brands make extra money now.
Some are less annoying than others though. Sony and LG seem a bit cleaner and using your own streaming box (like Apple TV or Roku) helps a lot because you can avoid the built-in menus. But sadly, it does seem pretty normal now across most smart TVs.