Go back/forward one word keybinding does not work in Nano 8.2

I'm using GNU Nano 8.2 in ZSH on macOS Sonoma and I'm trying to figure out why the standard keybinding to move the cursor back or forward one word, ^ + arrow keys, doesn't work. This happens both in the default Terminal app and iTerm2. I'm using a French physical keyboard but I've tried setting it both to French and US keyboard. Thanks