Thanks for reaching out to us. I was not able to find RTC-wakeup examples delivered on the RTD, let me check internally if we have something that can match your requirements. I will get back to you once I have more information.
To follow on this topic, please create a private ticket as described in this tutorial: Tutorial for NXP Support Case Portal. Please add the link to this post and my username so we can ensure I follow up with the topic.