At first I thought I was annoyed that "Create a radio alarm clock with Radio Argovia" was ignored just as skilfully as the procedures, which I only found with difficulty at all in the Home > Assistant settings thanks to the search.
After a little research, however, I reached my goal: in the Google Home app (which was/is also used to set up the Smart Clock) in the Assistant settings, simply change the language from German (Switzerland) to German (Germany). That makes the difference. Now it dutifully carries out the "Good morning" procedure after the alarm clock has stopped ringing (e.g. announcing the weather, opening the SmartHome blinds and playing Radio Argovia), which it refused to do before, except for the weather. Also, the instruction mentioned at the beginning to create a radio alarm clock instead of a standard alarm clock with ringtone now works. So yes, it can also be a radio alarm clock - with a little help.

Can be set up in the Google Home app under Expirations. It works like this for me. I have also paired my ceiling lamp and it goes on first thing in the morning.

Pro tip: You will only see the schedules in the Google Home app when you change the location of your Google Assistant / account to Germany.

you can thank me later.

As far as I know, you can only set the radio alarm using the voice function. To do this, you simply have to say "Set radio alarm". Then you will be asked for the time and the radio station.