I can load an image and then  resize it . But if I save it as a docx document and the I reload it, the image has the original size: the resized image is not saved.

 

You can test this in the Telerik MAUI ControlsSamples app, Import export example of the RichTextEditor control.

When copying formatted text from outside the control (Notes on iOS for example), and pasting it into the RichTextEditor using the context menu commands, the formatting is not applied.