
fellow aroace hereヾ(☆▽☆), one that i remember has an aroace background character i liked is this https://www.mangago.zone/read-manga/all_about_lust/
buut he is very much in the background lol

https://www.mangago.zone/read-manga/my_son_is_probably_gay/ https://www.mangago.zone/read-manga/wrong_appeal/ https://www.mangago.zone/read-manga/i_want_to_be_the_wall/ https://www.mangago.zone/read-manga/kimi_no_sekai_ni_koi_wanai/ https://www.mangago.zone/read-manga/shimanami_tasogare/ https://www.mangago.zone/read-manga/umi_ga_hashiru_end_roll/

I am reading this, both the characters don't really define their relationship, it's cute
https://www.mangago.zone/read-manga/kemutai_hanashi/
There's so many manhwa/hua/ga where the characters are first aromantic ( the characters themselves say they don't feel romantic love, don't understand it and they have never felt it)
and then they meet "the one" and suddenly they're able to feel love. It's treated like a character flaw a bit sad.