Clicking "Today" button doesn't update the inline events in the calendar. However clicking the dates cell in the calendar control loads the associated events properly.
---XAML
<ContentPage.Content>
<Grid>
<StackLayout Orientation="Vertical">
<syncfusion:SfCalendar x:Name="calendar" />
<Button x:Name="btn" Text="Today's Date" HorizontalOptions="CenterAndExpand" VerticalOptions="CenterAndExpand"/>
</StackLayout>
</Grid>
</ContentPage.Content>
--Code behind
private void Btn_Clicked(object sender, EventArgs args)
{
calendar.MoveToDate = DateTime.Now.Date;
}