In my .zshrc file I had the appropriate command:
source <(fzf --zsh)
And the keybindings worked but the "**" completion did not.
Turns out that setting the terminal to vi mode by default after the fzf command reset that completion
set -o vi
So the fix? Lol, just put the set -o vi
at the top of the file, before my fzf config.