Finally!
...i found an app to listen to music/radio through the loudspeaker of the apple watch! Its clear the hardware has not really a bass instead the loudness clarity and the higher frequences are quite amazing on the apple watch ultra. For future updates, I wish the lists in country and genres...appearing directly. now its "loading", loading loading until i move the finger over the tochscreen. For genres i wish the categories as: classical, funk, jazz, soul, soundtracks, chill, hiphop, rock, reggae etc. happy coding! Do you know a map navigation app with address input that outputs the voices through the loudspeaker?