Gradio is a GTK3 app for finding and listening to internet radio stations. Its features include support for all radio stations listed on radio-browser.info and automatically resuming playback after suspend.
Gradio can be installed from the AUR: AUR
Moreover, an official Flatpak is available and can be installed as follows:
$ flatpak install --from https://flathub.org/repo/appstream/de.haeckerfelix.gradio.flatpakref