Thanks for using Syncfusion products.
We are unable to reproduce the issue with” Circular Pointer value not changed while change the Value Property in code behind”, for that, we have attached a sample by changing the CircularPointer value through the Slider.
Regarding” triggering the Value changed event of CircularGauge pointer through Element Hosting”. We are able to reproduce the issue and we have logged it as an issue, in order to get the patch for it. You have to create an incident in our direct track support system in the following link.
Joy Oyiess Rex.K