shonen manga

One thing that has always amazed me in shonen manga is how CLOSE the bromance can be for two protagonists or side characters in a shonen manga.

Some are even potentially amazing couple material: Naruto and Sasuke, who stand as both the moon and sun; who are tied by a bond of ancestry (sadly), who end up being tied to two parallel gods....

On that note, I wonder why there isn't many gay/lesbian/bisexual/pansexual romances in shonen manga.
Before you criticize me and say 'WHO WANTS THAT IN A MANGA MADE 4 BOYS" please let me raise a point here.
The characters who fight together and bond and grow together can remain just friends, and that's fine.
But I think that it would have IMMENSE impact if two characters who have a super close bond with each other, who have fought both against and for one another becoming a couple in the end would be so amazing!

I know Cardcaptor Sakura is like shojo manga but it is quite interesting. For example Touya and Yukito were GREAT and I also think Sakura's friend Tomoyo had one sided feelings for Sakura. And it not only was good romance, but took nothing away from the plot at all- it was an excellent manga/anime!
AND I HAVE HEARD ABOUT YUYU HAKUSHO being inclusive too.... so i just wonder why some recent shonen manga are so desperate to be as hetero as possible....

I do wonder if shonen manga genre is maybe a bit outdated when it comes to romance sometimes.