Is there any site that lists all the apps that is available for Zorin OS in the Software Store i saw that Discord was available?
You can boot from a Live USB and check what is available in Software.
I've never used it.
I hope someone could answer this question.
Discord is available through the store as a flatpak. Personally (my own private opinion ) I would download the .deb package from their homepage instead.
I use better discord: