Hi Quentin,
Thank you for contacting Syncfusion support.
SfProgressBar(SfCircularProgressBar and SfLinearProgressBar) controls in Xamarin.Forms are developed for displaying notification about the progress of a task to the customer. So, we haven’t implemented any click event for linear and circular progress bar control. Instead, you can add a tap gesture for these controls and perform a similar operation. We have prepared a sample based on your requirement which can be downloaded from the following link.
In circular progress bar, we have provided a support for adding a custom content inside the control. A control with click event can be placed as custom content. To know about custom content, please refer the following documentation.
Regards,
Dilli babu