Time Variance Authority

"The Time Variance Authority (TVA) is a bureaucratic organization created by He Who Remains and located outside of time and space that originally served as a temporal law enforcement agency, tasked with preserving the Sacred Timeline by preventing the creation of alternate timelines."https://marvelcinematicuniverse.fandom.com/wiki/Time_Variance_Authority

Time Travel Possibility

"Time travel is possible, but not the way most people would like. In most science fiction movies, time travel usually focuses on moving backwards – something that is unfortunately impossible for humans! However, we know that time, space, and gravity are all related thanks to Einstein’s theory of relativity. To put it simply: the faster you go, the more things appear to slow down around you! We already know this is possible – the International Space Station at 17,500 mph.https://www.tutordoctor.com/blog/2023/february/astronomy-day-mind-blowing-facts-about-our-unive/