If I've understood this correctly, any mid-position is NOT set manually.
Meaning - while flaps up is selected, the FBW computer can increase flaps temporarily without human input to get more lift from the wing at high alpha.
As such, there's no way the RL pilots can deploy intermediate flaps anyway, so we shouldn't have the option.
I think.
It being shown for the Su30 is a different issue, and I suspect related to the simplified way the AI deals with this sort of thing rather than the flap/intake display.
There is a version of the intake problem with the Flankers, sure . . . . . but it's manifested by FULL flaps being deployed on the AI aircraft, not intermediate.