Hello @bruno.tx , thanks for the reply and sorry for being late.
During this interval, I decided to follow the zephyr tutorial I sent, so I left Torizon and migrated to a minimal reference image. I did exactly what the tutorial said (just adjusted the my phandles) but my A7 crashes when I start the M4 firmware. I have just created a topic about it here.
But I will return to Torizon OS and I will try your overlay and give a feedback in this post
Thanks!