How can I view whether a public Slack channel is accessible (i.e., can be joined by) by the members of only the current workspace, just a few workspaces or all the workspaces of the organization in Slack Enterprise Grid?
How can I view whether a Slack channel is only accessible by the members of a specific workspace or all the organization?
The symbol next to the channel name on the left panel indicates that the channel is a "multi-workspace channel":
Go to the channel's details panel on the right to see which workspaces have access to the channel:
Example where the entire organization (i.e., all workspaces) has access to the channel: