I just ran across "gum"[1] from charmbracelet which I intend to use! I just want to replace dialog. I came across whiptail, too, but gum seems nicer.

They have a TUI framework, too, among a lot of other related things. Some of their projects are Go libraries, some are a CLI tool, such as gum.

[1] https://github.com/charmbracelet/gum