The DocumentMapVisible/ParametersAreaVisible settings that I set in the initialization of the native Blazor Report Viewer are not respected.
I can hide/show these areas from the buttons in the report viewer's toolbar but am unable to have them hidden initially.
Currently, the only workaround is to have a JS function that clicks on the toolbar after initialization:
function reportViewerMapClick() {
$(".k-i-dictionary-add").click();
}