Even many American movies are no shows on most streaming platforms. Sometimes I'm like: "Let's take the top 30 movies that critics loved the most in US in year X".

As soon as it's earlier than 2005 you're gonna find less than half available across most streaming platforms, unless for renting/buying.

"Gold Diggers of 1933", "Stella Dallas", "Marty", "The Snake Pit", "Casablanca", ... I could go on.