Hello,
Unfortunately, you are not using a board sold by NXP, there is not much we can help you. I recommend you to go with variscite, they could help you better with this problem.
However, if you are using Yocto as OS, there is a file called init.rc that is located on the /etc folder, on that file you can add processes that will be performed during the initialization of the board. You can add the initialization of your app on that file. Hope this can help you.
I apologize for the inconveniences this could give you.
Best regards,
Diego.
