
This theory suggests that when Captain America traveled through the Quantum Realm to return the Infinity Stones, he wasn't the only version of himself doing so. Across different universes, multiple Steve Rogers were on the same mission. One of them may have encountered Kang and fought him—only to be killed. Later, our Steve found his shield and took it back, eventually giving it to Sam Wilson. But because that Captain America never completed his mission, it caused a branched timeline—possibly leading to the TVA’s arrest of Peggy Carter in Loki!
Could this be the real reason behind the TVA's interference? Let me know what you think in the comments!