I just installed Ubuntu 18.04 and a few snap apps (Slack, Spotify). Snap apps don't show up in the regular "app list" when I search for an app, and I don't understand why.
I'm running zsh, so I found an article about zsh not adding the snap "volume" to my path. I've fixed that by adding:
emulate sh -c 'source /etc/profile.d/apps-bin-path.sh'
To my .zshrc file.
This means that I can run which spotify and it shows up, pointing to the snap volume (so I can start Spotify from the terminal).
I've also ensured that there is a .desktop file bundled in the Spotify snap app.
Still, I'd like apps to show up when I search for them.
EDIT: Yesterday my apps magically started appearing. I guess some Ubuntu update took care of this problem.