I don't have a really good 5e source, unfortunately. There's not a lot for her or her clergy in 5e content - we have an entry from SCAG, which is a couple of paragraphs. It does cover most of what I said, though with a slightly less positive tone - all pain, willing or not, is sacred, and she is the deity that all practitioners in pain - torturers, etc., - give their passing thanks to. I will admit that it also does state that not all sects participate with willing supplicants all the time, and that in places where slavery is an accepted practice (such as Thay), there are sometimes sects that operate underground rings for capture and enslavement of new victims. What I personally choose to take from that entry, however, is the tacit admission that those cases are, as said, only a 'sometimes' thing, and that there are much healthier sects out there, that do not stray into that dark aspect of their goddess. I will admit to a certain amount of personal bias here; I want to look at and focus on the healthier aspects of worship and practice for her.
Embarrassingly, aside from that few paragraphs in SCAG... our most up to date 5e canon material is now actually BG3 itself, since it will be considered a canon source unless any book material ends up contradicting it (books trump games, in terms of canon conflicts, but in lieu of there being an up to date book source, games are considered canonical). In which case, Abdirak's books about his mistress do indicate an aversion to causing permanent or lasting damage. Killing someone is easy; maiming someone is simple; inflicting pain to the point that they nearly break, but which they will recover from both physically and mentally, so to suffer again anew later - that is art worthy of worship.
