ISO files don’t play on iPad Pro

Using INFUSE PRO iso files can’t play on my iPad Pro (IOS 13).
It works well on my iphone6 and Apple TV with same settings

Welcome to the forum!

Are these videos visible within the app, or what happens when you try to play them?

One thing to keep in mind is that some streaming options like UPnP, DLNA, and Plex won’t support ISO files.