One person mentioned on my last model about the possibility of making a left handed concept lora. So here it is. It is far from perfect and I can see how generation tries to make the characters have their right hand on an object still (dual wielding, two-handing, etc). I'd say it has about an 80% success rate at weight 0.75, and about a 40% success rate for guys. Play with the weights and up the weight of the trigger tags as well to get the best results. I'd say put dual wielding and two-handed as negatives.

Disclaimer: There also seems to be some kind of style bleed of some sort so be mindful of that.