Actually most of her songs are written, produced and mixed by herself with no help by other people whatsoever, iirc the entirety of her Miss Anthropocene album is (except the songs with features ofc). But I agree Delete Forever is one of her best songs (and top10 best singles of 2020 for me tbh), which is kinda funny since its extremely different to anything she's put out before and after and kind of like the opposite to her usual sound.