Hi Floris,
Greetings from Syncfusion.
We have logged a feature request on “Support for PasswordBox in SfTextInputLayout” and we have planned to include this feature in our upcoming Volume 1, 2020 release. This feature can be tracked through our Feature Management System
If you have any more specification/suggestions to the feature request, you can add it as a comment in the portal.
Regards,
Divya Venkatesan