Historical romance plots

I don’t really know how to word this but I will try my best Idrk how to use this question forum either rip

I’ve been very curious about what other people think when straight women authors make the plot point where it’s a historical romance and the fl is isekai’d into a “dark romance toxic bl”.

The fl changes the plot and she becomes the center of the story, then the original mc in the bl falls in love with her, when he was originally gay in the story. It completely drifts away from bl and it’s fully straight

I’ve read a few of these stories before, I didn’t really think anything of it. All of them were pretty meh so I don’t think this particular plot point makes them more interesting compared to other stories.

But I saw a person commenting that they didn’t like it when authors did this and it got me curious. Are these plots inherently problematic? I was just wondering, plz don’t jump me ^^