Chart: How to achieve a specific X-axis (an awkward log scale)

I found a solution, although I had to go tweaking my origin data to enable it.

I switched the percentiles reported out of my data structure so that they represented 1.0 - the_original_percentile to get numbers into a log range that could be represented. Following that, the keys were figuring out chartXScale and chartXAxis with a closure to tweak the values presented as labels using AxisValueLabel.

For anyone else trying to make a service latency review chart and wanting to view the outliers at wacky high percentiles, here's the gist:

Chart {
    ForEach(Converter.invertedPercentileArray(histogram), id: \.0) { stat in
        LineMark(
            x: .value("percentile", stat.0),
            y: .value("value", stat.1)
        )
        // Use curved line to join points
        .interpolationMethod(.monotone)
    }
}
.chartXScale(
    domain: .automatic(includesZero: false, reversed: true),
    type: .log
)
.chartXAxis {
    AxisMarks(values: Converter.invertedPercentileArray(histogram).map{ $0.0 }
    ) { value in
        AxisGridLine()
        AxisValueLabel(centered: true, anchor: .top) {
            if let invertedPercentile = value.as(Double.self) {
                Text("\( ( (1 - invertedPercentile)*100.0).formatted(.number.precision(.significantDigits(1...5)))) ")
            }
        }
    }
}

Although of note - at least in Xcode Version 14.3 beta 2 (14E5207e), using "reversed:true" in the ScaleDomain caused the simulator to crash. (filed as FB12035575) In a macOS app, there wasn't any issue

Resulting chart: