I highly agree that the past events should be added to the game, but there's a problem with the game size getting large. A workaround for this can be featuring the events in a new tab where the players can download them. There are events like Perilous trails or Unreconciled stars that feature immense lore about the characters and their backstories that can fill up gaps in the story. Also, there are players who don't read the manga or search for nitty-gritty details about the characters on Genshin sites. So, it's best to feature the past events as downloaded content that can be put to use in the future, so newcomers don't feel left out. Also, another addition could be to feature event-exclusive weapons in the Paimon exchange shop, where the players can get those weapons. Weapons like Cinnabar Spindle and Festering Desire are now the dust of the past and not available for purchase in the game. I hope the game introduces a feature where the new players can get these weapons or go through these events and enjoy the same thrill, joy, and rush we had during those events and get to know more about the story.