In most cases, no. American fiction is focused on the main narrative and doesn't commonly incorporate post-credit scenes. However, there might be some rare exceptions in experimental or unconventional works.
One post - credit scary story could be about a haunted movie theater. After the credits roll, a lone janitor is left in the empty theater. Suddenly, he hears whispers that seem to be coming from the seats. As he looks around, he sees shadowy figures moving in the aisles. Another is a story of a cursed DVD. Once the movie ends and the credits are over, anyone who touches the DVD starts to experience strange visions of a malevolent spirit.
There is indeed an end credit scene in Toy Story 4. It adds a bit of extra fun and sometimes hints at potential future storylines or gives a final touch to the movie.