Didn't they just say the prince was interested in both yuri and bl and corrupted the mc into enjoying it? It sure sounded like the prince was interested in both and probably bi. The mc its harder to say, but sounds at least somewhat open to it.
They like BL in terms of fiction yes, and likely also in terms of seeing it occur. I doubt that means they want to be the one it is done
to though. It is kind of like how I like the concept of doggos, but I don't want to
become a dog, nor live with the hassle that comes with owning one.
But yes, the author is prolly going to gloss over it rather than use it as a plot-point/topic. So odds are mc will be into it off-camera. Perhaps it will even be a "only when it is my gf, but not other men" kind of thing.