Hi,
I've been going through the documentation for the Jira slack integration and there doesn't seem to be a command that allows you to view a list of the issues for a project. Whilst the command /jira DEMO-1 does allow you to view and edit issues, it requires everyone using the channel to be very familiar with the issue IDs.
For our set up it's unlikely everyone is going to know which IDs relate to which task and in that case it would just be easier for them to go through Jira in the browser than the slack channel which isn't optimal.
Thanks,
Lucas