The USSR T-80U has the same issue:
You can bug report it here (just search a bit first so that you don’t report something that is already reported and known about): (Gaijin.net // Issues)
A guide on how to report bugs can be found here: ([Navigation] Technical Knowledge Base | War Thunder Wiki)
Edit:
seems like similar issues exist on other T-80 varriants as well but not all of them:
is meant to be like that tho with storage inside the fuel tank. Or are you just referring to that they slightly poke through the fuel tank?


I think this, on some of the T-80 tanks the ammo sticks out the backside and/or side of the fuel tank.
Also i haven’t played top tier yet, Does deasel tank actually help or makes everything even worse
It definitely does not make it worse.


