EasyBashGUI is a Bash functions library for *BSD and GNU/Linux that aims to give simple GUI functions using yad, gtkdialog, kdialog, zenity, Xdialog, gum, (c)dialog, whiptail or bash builtins depending on KDE or GNOME running or not, Yad/Gtkdialog/Xdialog installed or not and, eventually, X server running or not.
Why do you think that https://github.com/contour-terminal/contour is a good alternative to easybashgui