wrench1: Yes, good point about expecting other bolts, especially lower left to then also be subject to stretching if that was the case on the lower right. I just had tunnel vision about the single (seemingly) under-torqued bolt!
Jetstream67: Assessing bolt distortion via thread pitch measurements would certainly be a good check, but there is no reporting of this in the "Materials Laboratory Factual Report 22-071". They documented number of washers used and number of exposed threads (beyond nut end) on all three remaining bolts.