I’ve given you the reason behind the dictation between internal/external fuel tanks.
I’ve given you the differences between the internal structure of the Abrams and T-90M, and compared them to similar tanks.
Don’t start pulling off mental gymnastics now, after all of your questions have already been answered.
You just reposted a screenshot of the spall liner on the side of the tank something that I’ve already told you you can shoot under and still have the same effect being discussed over the “external” fuel tanks.
The liner you posted a screenshot of has no effect on what is in discussion.
The spall liner is very clearly inside the tank, and engulfs all fuel tanks in the forward hull.
The internal photo of the T-90M driver station reciprocates that model.
This here is the spall liner on the interior side of the fuel tanks. It separates the fuel tanks from the crew and fighting compartment, hence its classification as “external”.
This is corroborated by IRL images of the T-90M driver position.