Unfortunately that's impossible. Act One and Two contain so many choices, flags, variables and decisions that attempting to skip to Act Three would require hundreds of "What choice did you make when..." dialogues and would still very likely break the game in niche use cases.
There's no reason why you should have to replay the game, though, unless your device exploded (or you deleted the app on Android). The game transfers your saves automatically between each update (if you're on the Itch app and it breaks the manual saves, just click the "A" on the Load screen, to the left of the page numbers at the bottom, for the autosaves), and you can manually backup your progress if you're worried or want to switch devices.
You can also head over to the Discord, where people are more than happy to share their saves with you :)