6.9 covers sudden death time controls, as well as X moves in Y time. It includes those where there rest of the moves have to be made. So, G/90,+30 would fall under that regulation as would 40/120,SD30 or something similar.
In one time control, the prescribed number of moves is all of them
The USCF has a couple of rules in regards to this.
One is Insufficient material to continue.
K vs K, K vs K with N or B, K+B vs K+B if both bishops are the same color, and no legal moves that could lead to checkmate by the opponent (so if there is a helpmate, it isn't insufficient).
For a win on time, the insufficient material for the player with time on the clock is a lone king, K plus B or N and no forced win, K + N + N if the player with no time does not have a pawn and there is no forced win.
So by USCF (14 E) rules, the position in post 1 is a win for black if white lets the time run out.
FIDE is the same (6.9 covers flag fall). Chess.com is a draw, unless something recently changed.
You mean this...
Except where one of Articles 5.1.a, 5.1.b, 5.2.a, 5.2.b, 5.2.c applies, if a player does not complete the prescribed number of moves in the allotted time, the game is lost by that player. However, the game is drawn if the position is such that the opponent cannot checkmate the player’s king by any possible series of legal moves.
Now, does that only apply to situations where a player does not complete a prescribed number of moves?