Exactly that ^ but preferably with no romance. Though i dont particularly mind.
I've read so far:
Shounen Hakaryuudo
Komatta Toki ni wa Hoshi ni Kike! – its labelled as shounen ai but i can't see it that way
07 Ghost
and I guess a whole lot of sports manga can be included too. Such as:
Hikaru no Go
Haikyu!!

19 Tian best bromance, really gay. I mean, I guess one of them is probably actually gay but it's completely onesided as of chapter 119 so far.

Ive seen a couple of chapters of 19 days, I can see way you said 'really gay' hahaha 🤣

Saint Young Men - Jesus and Buddha on vacation on Earth. Jesus and Buddha are best bros.

Uchuu Kyoudai - actual brothers, specifically two brothers aiming to become astronauts.

Uchuu Kyoudai sounds interesting, ill check it out ^^

This request has been made lots of times before; I'll link you to some of the good threads. Most of the suggestions in these fit, but you might want to specifically look up my replies:

Butler-type or Closer than Bros
Pure Subtext
The Supreme Bromance/Sisterhood

The following categories will also have plenty of good titles, though not all 'cos of mistagging:
Bromance
Non-BL with Two Male Leads
Important Non-Romantic Relationship/s

Thanks calstine ^^ thatd be very helpful

And another category that'd be worth perusing: BL Subtext