I'm not fully sure if this adresses your problem - but this does something along the lines of orienting the text right to left.
uifig = uifigure;
label = uilabel(uifig);
label.Text = "right to left";
label.Text = fliplr(label.Text);
label.Position = [100 100 100 22];
label.HorizontalAlignment = 'Right';
If you need to rotate your text rather than flipping it you may use a text rather than a uilabel
uifig = uifigure;
uiaxis = uiaxes(uifig,'visible','off');
label = text(uiaxis,1,0,'Left to right');
label.Rotation = 180;
