Hi there,
I’m sorry if I’m not at the right place.
I just create an Ansible script that will build and install ros2 on your Raspberry Pi.
I’d like to share it with you and I sincerely hope someone else will benefit from this as well.
Have a look: GitHub - poschl/ableros: Automatically build&install ros2 on Raspberry Pi.
It’s not perfect but I guess it could be good start.