There's a closed pull request on the void-packages repository

fzf: install fzf.vim to Neovim plugin directory
https://github.com/void-linux/void-packages/pull/21733

Description:
For Vim users, FZF works out of the box, but Neovim users have to
manually copy /usr/share/vim/vimfiles/plugin/fzf.vim to the proper
Neovim equivalent.