I've never touched this device.
I assume you've read everything in here:
https://www.ti.com/lit/ds/symlink/ina226.pdf
Section 6.5 seems to be where the main action starts.
EDIT: when I get caught up with a mystery device, I go look at what they're doing on arduino. Sometimes you gets hints in the code, sometimes your eyes just glaze over.
But at least it's a start.
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