Not necessarily saying this is wrong, however, these studies have some flaws worth commenting on. At least the ones I have looked at — seems you linked a meta analysis with a lot of studies. Most are paywalled and I’m not familiar with all of them, so maybe some of them escape these criticisms.
But some common issues:
Many questions are about intimate partner violence within some timeframe, common timeframes being lifetime, past 12 months, and probably more. These questions are asked of LGBT people but in the studies I’ve looked at they did not ask if the relationship where the abuse occurred was an LGBT relationship. So e.g. a woman who experienced an abusive relationship with a man and then entered a relationship with a woman would count as an LGBT person who has experienced IPV.
This makes sense in the context of the studies, since most of these studies were doing something more like gathering life data and less like trying to prove that queer people are dysfunctional.
Another possible issue is that life experience studies are self reported data, so it matters how the self-reporters perceive their own life. IPV includes non-physical violence. So e.g. someone who is more sensitive to abuse, and recognizes abusive language more reliably, might report high rates of abuse in their past than someone who is less aware and has experienced a similar amount of abuse.