Why there isn't a popular curve for PPV vs Predicted Positives (PPCR)?

As much as I can tell there are 5 poopular curves for Performance Metrics, and the only one that includes PPV includes Sensitivity as well.

In terms of prediction (and not detection) it would be more insightfull to see the tradeoff between PPV and Predicted Postive Conditional Rate, I wonder why it’s not the norm? What Am I missing?

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“Positive” and things derived from it like PPV only work in the special case where the test has an all-or-nothing binary result.