we’ve just tried it in our test installation and the Quick View is correctly shown also on iPad devices as you can see in the following screenshot
Maybe something in your installation could conflict with the plugin and cause this issue.
In this case, to discover what is causing the issue you should isolate the plugin behavior; to do this, please, try to deactivate all plugins, leaving only WooCommerce and YITH WooCommerce Quick View active, and see if the problem is solved. If so, try to activate them again, one by one, to see which one causes the issue.
If the problem isn’t caused by a plugin, try to activate a default WordPress theme (i.e:Twenty Twenty) and see if you have the same issue.
Also, if you have customized some files in your theme, please try with a fresh installation without any customization.
If you have a staging installation, please try these solutions and let us know what’s the result.