Duration not using correct delimiter for locale

Hello!

I would like a String from seconds that uses the appropriate locale for the user. I'm using Duration like this:

        let localFormattedTime = duration.formatted(
            .time(pattern: .minuteSecond(padMinuteToLength: 1))
            .locale(.current)
        )
        print(localFormattedTime)
        // prints: 1:15

This is the wrong delimiter for my region, it should show 1.15.

In order to confirm that my locale was being read correctly I tested with a Date():

        let timeFormatter = DateFormatter()
        timeFormatter.dateStyle = .none
        timeFormatter.timeStyle = .short
        timeFormatter.locale = .current
        let timeString = timeFormatter.string(from: time)
        print(timeString)
        // prints: 15.18

This is the correct delimiter as expected however I want to format from seconds not a Date().

What am I doing wrong? Any guidance will be much appreciated 😃