You know, I rewatched season 3 the other day and rewatched the ending and I came to the conclusion of how Y/n would act without her powers. Here is what I think:
Home girl would STRUGGLE. Like bad. She would get over it, but she would struggle. She is so used to her powers being part of her everyday life (all of the siblings are but especially her) I think it would be like when she first got her powers; she would go crazy. In my head, when she first got her powers, she went insane (not literally but you guys get what I'm saying). This is how I see it:
With her telekinesis she would get used to not having those quicker. She will forget she doesn't have them when doing daily stuff (I can just see her trying to close the door with her telekinesis and forgetting she doesn't have them and having to walk all the way back to close it) but she will get used to not having them.
With her rebooting powers she will struggle more with that. In my head, her rebooting powers is like her shield. It is what she uses to protect herself. If she is ever in a situation where she needs to protect herself, she knows she can easily do so by using her rebooting powers. So, she struggles without those. Maybe even gets some anxiety without them.
BUT without her telepathy, oh girlie is going insane. The way I see it, when she first got her telepathy, she went crazy because she was hearing everyone's thoughts at once. Growing up she got used to it. For her it's like background noise. You know how when you are listening to music and are studying or reading you hear the music, but you don't REALLY hear it? It's like background noises. Thats what she hears with everyone's thoughts. So, I came to the conclusion that if she ever were to lose her powers (specifically her telepathy) she will always have something playing in the background. Whether it's music, tv shows, or podcasts there will always be background noise because if she doesn't have it, everything will be too quiet for her.