* Who Framed Roger Rabbit (1988): This movie literally takes place in a world where cartoon characters and live-action humans coexist. Therefore, it features numerous references and cameos from other Disney animated films, including Mickey Mouse, Donald Duck, Goofy, and even characters from Snow White and Pinocchio.
* Ralph Breaks the Internet (2018): This movie takes place in the vast world of the internet, where Ralph and Vanellope visit different websites, including "Oh My Disney" which is packed with Easter eggs and references to Disney's entire library of films. This is less about showing actual props, but more about acknowledging the existence of numerous Disney characters and worlds in a single setting.
So, the answer depends on what you mean by "showing things and props". If you're looking for literal, visual references, then Who Framed Roger Rabbit is the prime example. If you're looking for a broader acknowledgement of the Disney universe, then Ralph Breaks the Internet fits the bill.