Firstly, not all content is transferred from old plot to a new, nothing was deleted, don't mislead people.
Old content and plot available if you choose new game - choose chapter - extra
Instruction on the site - https://www.teamsadcrab.com/activate-old-story-extra-section/
Secondly, some content NOT AVAILABLE IN MEMORIES, due rules on some sites, BUT STILL IN THE GAME.
You can see and play it, when you go through the old story, from the chapter you need, where scene, mini-game or event was available