logitech k 380 and iPhone

Hey guys! I have a logitech k 380, and the home, end, page up and down keys don't work on iOS. Would anyone have a solution? When I use it on Windows, the fn + arrows combination works, but on the iPhone it uses shift arrows, or arrows, option arrows, one of these combinations. I'm still having this issue, so I haven't delved too deeply into using keyboards with VoiceOver.