This might be worth a visit when trying to get dormant sleep working, especially if it will wake on RTC.
https://ghubcoder.github.io/posts/deep-sleeping-the-pico-micropython/
This guy asked in the post if he could steal the code, my work and he gets the credit, such is life.
He has improved on my version so cannot complain.
Cheers
Jim
EDIT: putting the RP2040 into dormant mode screws up a lot of things. (see the last posts in the thread)
The print statement does not work after dormant because the micro loses the connection to the PC.
This is a practical use of dormant mode.
