It would be nice to have a Column view option on iPad as on Mac. iPad has a lot of wasted screen space under the current view options, and the Column view is more symmetrical and pleasing to the eye (my eye, at least).
Also, the View icon in the top toolbar is completely non-functional unless the sidebar is showing. Very odd.
I recommend contacting Omni Support if you haven’t already. You can send them an email from your iPad by going to Settings and choosing Help > Contact Omni.