This is a tough one.. I think it’s almost impossible.
I don’t even know what genre Evangelion is, Josei.. Shounen.. but it’s pretty clear that Kawaru and Shinji loved each other.
Here are maybe some sites to help you out too but most of them are considered shoujo,
https://akibento.com/blog/2017/02/24/canon-gay-characters-couples-non-yaoi-non-yuri-anime-manga/
https://myanimelist.net/forum/?topicid=1736073
Also Ymir and Krista Lenz from attack on titan are canonly confirmed as a lesbian couple by producer George Wada.
More websites but it’s really hard to find any shounen in between.
https://thebiem.com/40-best-gay-anime/
Anyone know any shounen manga with canon gay pairing? I tried looking it up on google but im still unsatisfied with the result.