Iced is a Rust GUI toolkit which is high level than any existing toolkits including Qt, GTK etc. System76’s COSMIC desktop is developed using Iced. I believe Iced will replace Qt and GTK in Linux space in coming years.
Rust is not only for low level programs, but it’s a general purpose high level language for any kind of applications. If the OP wants to go high level than Rust, there’s always Haskell which is an older cousin of Rust but with more functional and higher level abstractions.
Good that I flashed OpenWrt on my ASUS router. Couldn’t be more happier.