Google Pixel 8 text-to-speach eSpeak or SherpaTTS does not work

in Organic Maps and does not work in OsmAnd~
Organic Maps says tts not available
OsmAnd~ says not installed.

Has anybody achieved to get tts to work in one of these apps under actual GrapheneOS?

best regards
Stefan

So I finally got it to work:

As I am german my pixel 8 is set to system-language german
I will try to translate the items

I downloaded Sherpa TTS-App
inside Sherpa TTS I downloaded the language (german deu (de-css10))

I opened Einstellungen (settings)
scrolled down to the bottom
Bedienungshilfen ("help to use")

scrolling down to the bottom
Sprachausgabe (text to speech)

bevorzugtes Modul (preferred module)
Sherpa TTS

Then rebooted my GrapheneOS pixel 8
and then in organic maps text-to-speech can be switched on
Same in in OsmAnd~ text to speech is working now