Not able to use custom TickProvider

I’m updating from Xamarin iOS SciChart v2 to v3 and just hit the issue that i can not use a custom TickProvider because there is no overridable UpdateTicks method.

I could not find any TickProvider code in the v3 Examples so the docs are my only source:
https://www.scichart.com/documentation/ios/current/axis-ticks—tickprovider-and-deltacalculator-api.html

According to the docs, I should override SCINumericTickProvider or SCIDateTickProvider

class CustomNumericTickProvider: SCINumericTickProvider
{
    public override void UpdateTicks(SCIDoubleValues minorTicks, SCIDoubleValues majorTicks)
    {
       //...
    }
}

But there is no UpdateTicks method to override.
I tried to override the Update() method instead:

public override void Update()
{
    Ticks.Clear();

    Ticks.MajorTicks.Add(5);
    //...
}

But that is just causing a freeze/crash at runtime.

It’s worth noting that it works well on Android because there is a UpdateTicks method to override.

What should I do?