Show works by providing the reader with context to infer not baldly stating a conclusion ( telling via dialogue) then throwing in ambiguous direction
It's not ambiguous if the context makes it clear. The only context I gave in the micro-example is the line of dialogue. In this case, the dialogue is not telling. It's someone stating a deduction. I couldn't be arsed to write a whole paragraph for it. Your paragraph just provides what (presumably) would have come beforehand in the story. It doesn't change the dynamics of how the text interacts with what came before it.
You understood from reading my two lines that the glance was meant to imply accusation. I never told you that. You replaced a glance with a longer line and some dialogue, which makes it clearer, but the effect is still the same.