What about supporting INotifyCollectionChanged data source for the Grid?

A text/ html editor similar to asp.net core

 

https://www.telerik.com/aspnet-core-ui/editor

A DateTime picker that 'understands' localized standard/daylight savings time and prevents entry of an illegal time in the spring 'leap forward' and disambiguates the st/dt with the same hour during the 'fall back' is desired. It is almost impossible to get a good UX if there are separate Date & Time pickers meant to populate a single DateTime value.