[BeetleB]

Since I've not used fzf, I don't know how good this is, but there is a "xontrib" (i.e. plugin) for some of fzf capabilities in Xonsh:

https://github.com/shahinism/xontrib-fzf-widgets

You can get a list of (known) xontribs here:

https://xon.sh/xontribs.html