I don't know what "via RD" means. You just set up, inside EDDiscovery settings, to enable webserver - it uses a port number (you can change) and can be viewed via a browser on the iPad or tablet over your network. It is readable enough, you can change icon size and the touchscreen can bring up info like a mouse on the main prog. You can show different screens, I didn't use the webserver at first as it didn't have the scan graphic screen, once that was added I jumped at it.
Here is a pic showing the size I use (I have blacked out the the mess on my desk, sorry) to give you an idea...
View attachment 331968
(mucked about a
bit lot so it will upload and to try to give an impression of size... that is a 2017 9.7" iPad..)
(didn't realise the iPhone pictures are so huge!)
Just noticed that a new 10.2" iPad with double the RAM costs less than my 9.7" one did in 2017. (Now I am wondering, do I actually NEED 2 iPads?

).