@bdkrae I copied your reply to the github issue. I think github is indeed a better place to discuss the progress. Even if nobody of the Zephr developers helps directly, they still might give hints how to achieve a good...
Dear bdkrrae,
I created an issue in the Zephyr repo with the request to support Teeny 4.0 .
https://github.com/zephyrproject-rtos/zephyr/issues/30204
Perhaps we can discuss there how to proceed?