We are looking for a configuration in DateTimePicker to set a time range (e.g. 8AM till 10PM) which gets applied to every date.
In ASP.NET AJAXs RadDateTimePicker it was possible by setting StartTime and EndTime in TimeView.

.NET 6 introduced DateOnly and TimeOnly types, but none of the relevant date/time controls support these types.

There is already a feature request to support DateOnly in DatePicker; this feature request is about adding support for TimeOnly to TimePicker.