"Unable to locate package" for exa on WSL 2 Ubuntu

I'm trying to install exa on Ubuntu 20.04 LTS on WSL 2. Whenever I type sudo apt install exa, I get this response:

Reading package lists... DoneBuilding dependency treeReading state information... DoneE: Unable to locate package exa  

I saw that the apt repository for exa is universe, so I ran sudo add-apt-repository universe but it says:

'universe' distribution component is already enabled for all sources.

I've been able to install other packages like docker just fine using apt install. I'm still super new to Linux in general, so any help would be appreciated. What am I missing?