It's not unheard of for males to have disorders that cause gynaecomastia and there have been reports of lactation in rare circumstances, but here it was induced. Hardly miraculous IMO.
The thing to be concerned about is the medications there, they would be passed on in breastmilk. There is a complex process of various hormones that work to stimulate the breast ducts to grow and start producing first colostrum and then later milk, various reflexes (let down and ejection) that occur and even the composition of the milk itself varies over a feed and depending on the age of baby.
Then the last bit is that they only managed for six weeks, and I bet near the end of it the baby wouldn't have got enough. Clearly it wasn't enough to meet demands and growth spurts which normal lactation would handle. Looking it up, a newborn only needs 30-60mls per feed, this goes up to double that and peak at 900mls daily. So to my mind it was really a failure, they couldn't sustain it.
It's very concerning also they claim they have to DIY and 'reclaim their medical agency'. The fact is it's forcing the body to do something it wouldn't do naturally and these medications are not benign, it's no surprise it hasn't been researched because it's all an experiment in the first place. One that can cause a whole heap of problems with people having erroneous ideas like double the dose, double the effects. It's more like double the dose, double the side-effects for zero benefit and more potential harm. Blind leading the blind is not a good idea.