Stream EOS to iPad

You could use ETC's iRFR app on your iPad. Since you already have a network configured, you should just need to install the app. It is a $50 app, though.

iRFR doesn't show magic sheet

I’m guessing when you say that a miracast dongle, you mean something like the AnyCast? If so, that kind of dongle only works on the receiving end (to my knowledge), mirroring an iPad onto a monitor with the dongle. One option to mirror a monitor is this solution for a TV camera. I’m sure there are others, too. www.came-tv.com/.../came-tv-wireless-hd-video-kit. Probably the best option is an app like ETC’s iRFR or one that allows a custom layout like TouchOSC. One other option is to screen mirror a computer running Nomad. This would probably be the cheapest if you have a Mac or windows machine avalible. I‘ve tried Chrome Remote Desktop and it works pretty well. 

Thank you for the feedback. I ended up using mirror mode on an offline editor laptop on the same network. I then used an app called Duet Display, which allows me to look at the desktop on my iPad. On the ion, I called up the magic sheet view and was able to view it on the iPad.

This worked well for a while, but the offline editor crashed after about thirty minutes.

That should have all worked but Duet might have been an overkill and perhaps caused the offline editor to crash as its not just a screen mirror its actually makes the iPad into a full touch screen monitor ie you can interact with the laptop from it. 

In theory if you had the right licences you could effectively run your magic sheet on the ipad - I've done that with nomads, so if that's set to act as a secondary to the ion you could control the Ion from the magic sheet on the ipad.

There's also another app ApowerMirror that's similar to Duet that might be an alternatice if Duet is not stable on your setup.

One other app I've used for this is Yam Display (https://www.yamdisplay.com/). They have three versions: Air (wireless), Display (wired w/o Apple Pencil support) and Pad (wired w/ Apple Pencil support). I've had success with all of the three versions on my iPad while running EOS on my Mac.