I would like to view photos on iPad, merely due to bigger screen and can view more details of photo taken by my SL2.
I haven't figured out a way to establish a connection with iPad. The existing iPhone connection does not work on iPad.
Of course you can use Camera Connect with an iPad - or at least mine, a mini 4. I've been doing it for about 3 years now. Just requires a separate software configuration on your camera. Your iPhone connection is probably called Set1. Just add Set2. Not easy, but nothing is easy with the Camera Connect app. But I did it, with a lot of persistence.
Or just go to Best Buy or an Apple store and buy a "Lightning Apple iPhone iPad card reader." Simple to use, and flawless. I got mine for about $30 at an Apple store. Best Buy sales them too. Or get a generic one for half the price on eBay (don't know if they are any good, though).
Well, that is your answer. You cannot connect directly to the iPad. Both must connect to the same hotspot, like your phone.
I understand that, but it wouldn't establish a connection between iPad and camera. I am wondering if this is a limitation that only one ios device can connect to one camera.
Incorrect. I have been connecting my 80d with my iPhone and my iPad for years, and my iPad isn't connected to anything - no hot spot, no iPhone, nothing. The interface is between the iPad and the camera. Nothing else is involved. But it isn't easy. Better to just go buy one of these.