Ant-Man and the Wasp: Quantumania's two post-credits scenes are a step up from the MCU's Phase 4's, but Phase 5 still needs to improve the MCU's after-credits bonus footage. The Marvel Cinematic Universe popularized the concept of post-credits scenes as teasers for future projects, encouraging both loyal fans and general audiences to sit through the credits and look forward to the next movie. And 15 years after Samuel L. Jackson made his debut as Nick Fury in Iron Man's post-credits scene, Phase 5 is still keeping the tradition alive.

https://screenrant.com/mcu-phase-5-post-credits-scenes-problem-fix/