Spider-Man No Way Home, Loki, which established the TVA which is a fan favorite and crucial to establishing the concept, Dr. Strange was a direct continuation of Wandavison which also helped by diving into alternative realities and cosmic horror, Deadpool and Wolverine, I already mentioned DC Time Crisis and agree on that take about Flash.
The laundry list is much larger for mediocre bad from films and shows that had zero to do with the multiverse. Although, after
Thinking about this, I think it makes it easier to rely on that plot point too much and get lazy like Gunn did.