Interesting thread.
Based on my understanding of donking as BBvsBU HU postflop, I didn't think this was a donk. My understanding was (based on what I recall from the Kanu7 course) it's usually lower and connected boards for BBvsBU, with the height of the board that BB can donk going up as you move back to the positions to UTG.
I checked in GTOWizard, and it has BB donking 0.3% on this board, so basically never.
Now for comparison here is, 652r
As you can see here BB has a significant donking range, primarily using a smaller sizing but also mixing with the bigger sizing. My understanding is that big blind prefers to donk on these connected boards where they will have some straights that button might not have.
These are just my thoughts and GTOWizard's sims. Feel free to let me know if you disagree with my understanding of what boards BB should be donking on.
All of these GTOWizard Sims assume 100bb pre-flop stacks.