You're using asdf to manage your version(s) of node.js. You have some packages globally installed with yarn that are available as executable binaries. When you install and switch to a new version of Node, those global binaries no longer work.
Even uninstalling and re-installing those particular packages doesn't necesarily fix it. That's because broken symlinks have been left behind.
asdf can help fix this with its reshim command:
$asdfreshim<name><version>
For instance, if you want to start using 14.4.0, you can reshim like this:
$asdfreshimnodejs14.4.0
This will re-sync all the symlinks so that you are able to access and run those binaries again.