Is it possible to send TTS to a Frontier Silicon media player?

I have a Medion Radio that is added into home assistant as a Frontier Silicon entity.

I want to send some TTS messages there to remind my kid that needs to take their medicine but when I select it as player in the automation or in the Media Explorer Google TTS or Piper are not visible.

Is it possible to send TTS audio there? Or some workaround I can use?

Thanks!

Frontier silicon radios can usually play a media file like mp3 or a media stream like a http stream.