Hi Halil,
Thank you for Contacting Syncfusion Support.
We can reproduce the problem from our side and it’s a framework level issue with upgrading Xamarin forms version with SfChart. We will provide you a custom assemblies built with 2.4.0.282v. A support incident to track the status of this problem has been created under your account. Please log on to our support website to check for further updates.
Regards,
Durgadevi S