.Net Maui Validate Property of a Model in the ViewModel Class

I am using MVVM along with the MVVM Community Toolkit.

I have a Constructor in my .Net Maui ViewModel

public EmployeeEditViewModel()
{
	CompanyInfo= new PYEModel();
}

I have an Observable property in the .Net Maui ViewModel

[ObservableProperty]
PYEModel _companyInfo;

These events are in the Code Generated Community Toolkit.

OnCompanyInfoChanging

OnPropertyChanging

OnCompanyInfoChanged

OnPropertyChanged

For some reason I can't get any of these events to fire when I change a property of the CompanyInfo Observable Property.