In the newest blogpost Discord said they will "shift" the store tab to communities:
https://blog.discordapp.com/empowering-developers-with-community-and-commerce-68d9c0712662
With game commerce shifting to communities, we've decided to replace the store tab with our Nitro games catalogue. For players, finding and buying games now happens through servers. Your library remains untouched by these changes.
https://blog.discordapp.com/empowering-developers-with-community-and-commerce-68d9c0712662