Everyone knows all the apps on your phone

Sort of. They have a list of apps you've bought/installed through app store, and they can figure out what you've deleted based on what your phone is pinging for update checks on.

If they went beyond that, or disclosed that knowledge, or allowed an app to get that manifest without your permission, it would destroy their brand image built around privacy, in a way that would cause long-term irreparable damage.

They decided to not comply with laws compelling them to add back doors to optional encryption on iCloud storage, rather than tarnish that image, because they know how valuable that trust is.

You can dump on Apple all you want, but compared to Google who plead with people to use their browser and phones to improve adtech surveillance they can monetize, I think they're doing OK and are a lot more trustworthy.