Name : ov-git
Version : 1:0.37.0.r68.gb82e1b1-1
System : Archlinux (linux 6.12.9-arch1-1)

When using "-F" colorization features don't work. For example if I do this:
df -h | ov -F -C
the colored line feature is dropped.

How should it work?

IMO you're asking for output to get alternate line colored so it should be, regardless of how the view is showed. It's important to note that -F is an option from ov itself, at least from --help, and is standard for more less-style apps.

Thanks for all the efforts!