Marvel Studios' groundbreaking success reached unthinkable heights after Avengers: Endgame, but that might've also marked the studio's peak. Following the Infinity Saga, Marvel Studios expanded to television and has produced more projects than ever before. Films like Spider-Man: No Way Home were knockout hits, albeit for Sony, while Ant-Man and the Wasp: Quantumania struggled critically and financially — a rare occurrence for Marvel Studios.
Source:https://www.cbr.com/mcu-succeed-without-iron-man-black-widow/