Which IR remote to select in OSMC

So with harmony hub to work work Vero, do I plug in the extender into vero ? Or does it work fine without it… the hub & Vero are next to eachother, so far the remote on the harmony app isn’t working to navigate Vero.

2nd question is could I use the BT Vero remote & have the Harmony IR hub control side by side? Or do you have to choose between Vero BT remote & IR option?