Clearly, the rat only did this in the Endgame reality, the one of just 14,000,605 in which the Avengers beat Thanos, that Doctor Strange viewed with the Time Stone during Avengers Infinity War.
And if Alligator Loki really did eat the wrong cat and the other mog ate the rat, then that would mean no Time Heist, ergo a Nexus event not be pruned by the TVA.
The theorist wrote: “I haven’t any evidence to back this up other than I’m stoned and it’s funny.
“Edit: Also alligator Loki is from duckworld. This adds nothing to my theory.”