I love how every other villainess' harem these days is tremendously bisexual. What a wonderful time to be alive. Now, if only the male-lead isekai can follow suit...
it's easier to do yuri-bait then yaoi-bait after all. Since male-lead isekais have more male readers than female-lead isekais, and they are much more vocal about the things they hate or dislike. Also, in my experience, male fans are much less tolerant/amicable towards LGBTQ+ related things.
For example, Omniscient Reader's MC and a male character is kinda close, so they're shipped a lot, but whenever people talk about the ship in the comments, there are tons of downvotes for those comments.