Forward-delete with Logitech K380 keyboard on macOS
Fn/keypress combinations are combined in the keyboard before being sent to the computer.
Windows uses these Fn combos in a completely different way to Mac. Testing on a Logitech K830, Fn/Backspace actually sends what the Mac reads as F13.
On the upside, the keyboard has a dedicated Del key right above the Backspace key.
I suppose you could try Ukelele or even Karabiner to remap this - I have little to no experience with either.