So there is a neat script that I use on my Void Linux machine called fuzzypkg and it's basically just a wrapper for Void's package manager xbps and let's you search the repository using fzf.
I've been playing around with some very elementary functions, combining pkgin avail with fzf but I'm not having much success.
I wonder if anyone else is clever enough to make something similar for pkgin and perhaps even pkgsrc