is a Riteru read of ABoT the intended one?

It can be if you want it to be buddy. Go enjoy the world!

More genuine answer: I'm an aro-ace writer with a long long streak of gen-fic. Shipping doesn't interest me. I don't hate it; it just doesn't click for me at all. I joke that the only way romance ends up in the story is if it's a plot-necessity (Tetsuo and Jun are there because 'married man suspected of having an affair' is what pulls Reigen into the entire Mogami-possession plot. The Kageyama parents are married because they're, well, the parents. Teru and Mei's relationship is a joke until it's plot-relevant.)

So to me, I'm not writing Ritsu and Teru's relationship as a ship. But also? This is all pretend. It's all transformative. This is for fun. I absolutely know that if I were a ship-writer, Riteru would be the obvious choice. I know they're one angry-kiss away from being someone's enemies to lovers fic. So if you look at Ritsu and Teru in ABoT and say "they're holding hands, to me", go right ahead, go hog-wild, come play Barbies with me.