I just wanna say a thing about rarepairs real quick. I enjoy some rarepairs. I don't typically seek them out, just happen upon them and think "huh, kinda liked that."
A notable one for me would be Eskel x Priscilla from The Witcher 3. I think I first saw them put together in a A/B/O regency AU geraskier fic (saying all that out loud would 100% give me brain rot), and at first I thought it made very little sense, but I came to love it (thank goodness cause they took up almost as much screen time as the main pairing). The characterization of them was so sweet, and I thought their personalities vibed.
I've only stumbled upon this ship in one or two other fics, and never as the main pair due to my tag filtering, but I appreciate it when I see it. If I was really hungry for more content relating to that ship, I would write it myself. Sometimes you have to push your own limits of creativity to bring the things you enjoy to life, especially if they're really niche.